I received the shot on Friday, June 25 at about 1630 hours. At about 1500 the next day, Saturday, June 26, I felt a fever coming on. By the next morning it had dissipated, and other than a sore arm and some general fatigue, I felt better. I went to work all the next week, but on Saturday, July 3rd, I slept until almost noon, which is very unusual for me; also I awoke with a bloody nose. The only thing of note during the week was that my right calf and thigh started hurting in a couple of places, but I figured that I must have strained it slightly and that the pain would go away soon. I did take some naproxen during the week and it seemed to help.  I started doing some yard work and as I was mowing I felt like it was getting hard to breathe. I finished the front lawn, which is not very big, and sat down for about a half-hour and rested before tackling the back. Usually I do the whole thing at once and it doesn't take me very long. I found that as I mowed the rest of the lawn that I was really struggling to breathe and I couldn't take a deep breath at all. I felt like I was going to collapse but i managed to make it back inside and sit down. I must have sat for a couple of hours before laying on the couch in search of a place where I felt like I could take a breath. I didn't feel like I could pull in all the air that I wanted to, no matter how hard I tried. After about four hours I got up and went to bed, where I slept for about 12 hours and again awoke with a bloody nose. I basically spent all of Sunday, July 4 and Monday, July 5 in a recliner resting and trying to breathe. My right leg was still hurting and I still couldn't draw a complete breath.  I made myself get up and go to work on Tuesday, July 6, and made it through despite having to stop and gasp following every exertion (even walking a few feet). I took more naproxen and pushed through the rest of the week, having decided that maybe I had a touch of pneumonia and that maybe it was getting better. My right leg continued to hurt and I still couldn't take anything resembling a deep breath, no matter how much i wanted to. On Saturday, July 10, I laid down on the couch in the early afternoon and passed out for several hours. My wife, who had been out of town for most of the prior week (else I would no doubt have been to the ER sooner) got worried and checked my temperature and O2 levels and found my oxygen to be low and my temperature to be high. She insisted that we go to the emergency room. We went, and following an EKG, a CT scan, an X-ray, and an ultrasound I was diagnosed with multiple bilateral pulmonary embolisms and was admitted into the hospital on July 11, 2021. I started a course of Eliquis and as I was responding well in terms of no pain and having passed an echocardiogram, I was discharged at about 1700 on July 11. I have been on Eliquis since, and have had two follow-ups with my PCP as well as two different blood work done, both of which show improvement. I also have an appointment with the hematology clinic  on August 17. I am feeling better now, can breathe easier now, and do not have as much fatigue as my stamina returns. My right leg does not hurt any longer and the swelling is mostly gone.