Since I have had adverse reactions to a vaccine before, I waited 30 minutes before leaving.  On the drive home, I began shivering and my left arm was throbbing.  When I got home, I pulled my short sleeve up and saw the injection area was swelling.  Under the band-aid, there was a small bruise, but I don't believe that had any impact on what was happening.  I took 600mg of Ibuprofen and grabbed an ice pack.  The shivering and cold I was feeling got progressively worse (omitting any impact the ice pack had, which was negligible).  I took my temperature around noon because I was still freezing under 2 pairs of leggings, undershirt, tee-shirt, sweatshirt, hat on my head, and a blanket.  My body temperature was in the low 96 range, verified by using 2 different oral and one ear thermometer.  ( I do not recall exactly, but I put that info in the vsafe app).  My arm continued to swell.  By the next day, it looked like someone put a ball under my skin, with surrounding areas swollen.  It was at least 3 inches in diameter.  When I lifted my arm, even the feel of fabric brushing the area caused increased pain.   I continued with the Ibuprofen and added zyrtec hoping it might help if there was any sort of allergic component.  The shivering continued and my low body temperature persisted for more than a week.  It took several weeks for my arm to heal.  It healed in time for dose 2 on Feb 9, but I was reluctant.  I spoke with some of the nurses there before agreeing to get dose 2.  One of them told me that the shivering was not uncommon, but she doubted many monitored  their  temperature like I did, and the swelling was not uncommon either.  I described as above, but she told me that the trend was that people who did not do that well with dose 1 (citing all of the people who were vaccinating for the county that had dose 2) did not have many complaints after dose 2.  They recommended I stick around for 45 minutes, which I did (since the last reaction began within 45 minutes).  Fearing I might lose use of my right arm (while I'm ambidextrous, my left hand writing has suffered as all of my work setup is geared toward right handed people), we used my left.  I showed the nurse where the first one was, so she moved the dose 2 site about 1.5".   I was fine after 45 minutes with only a mild swell, so they had me stick around another 15.  No change, so I went home.  Again, it was not nearly as bad as the first, but it was bad enough that I still needed Ibuprofen, ice packs, and had difficulty raising my arm at a 45 degree angle for several weeks.  The chills lasted only a few days and my temp was closer to normal (though I do not recall exactly).   Since the vaccines, I have had recurrent issues with my arm.   While not always having me think I needed to head to the doctor, I did schedule more than once, but cancelled because the pain resolved before I was seen several days later.  I occasionally get a "zap" in the area my arm swelled both times. Once, I was lifting a box ( I have had intermittent back issues, so I am VERY careful), and I felt the zap.  My right arm was fine.  My left swelled some and was sensitive to pressure for almost 2 weeks.  After a week and a half, I decided I needed to see the doctor, made the appointment, but cancelled the day before because there was nothing to see.  Many more instances since that are all similar.  I am currently about 5 days into the most recent issue.  I was pulling on our Christmas tree, trying to straighten it, and felt the zap.  Due to my angle, there was actually more tension on my right arm than left, and it is a 7.5' artificial tree, so not anything that was of significance.  This time, it is one of the "bad" ones, and I have made an appointment with my doctor.  I'm going to keep this one, regardless of if it feels fine or not.  As I type, I can feel a general ache and occasional more significant pain  that radiates up the muscle into my shoulder, then if I turn my head a bit left and slightly up, radiates up the left side of my neck about 2" from my spine.   Other general observations and info: 1.  While it was nameless to us, I had COVID in January 2020.  I barely moved for 8 days, had a 103.5 fever for 5, above 100 for 9 or 10 days, used my inhaler about every 4 hours, ached all over, and coughing.  I cannot recall everything because I slept for most of those days.  Not flu.  Just before feeling really sick, I noticed that my son's shoes didn't smell nearly as awful as they had ( strange statement, but true) and everyone thought I was crazy.  Then, I was cooking and was tasting the tacos and guacamole for seasoning.  It all tasted "off", so my daughter jumped in and finished.  To this day, avocados still have a more "earthy" taste, which is off from what I remember.  Most of my smell and taste came back by March/April.   2.  I did not feel back to "normal" energy-wise till April.   3.  Since the vaccine, my energy level is lower (not improving despite additional measures), I get more frequent migraines, and the issue with my arm is still problematic.