Instant headache and pain shooting down arm and side while being injected, sick feeling and light headed right as I was leaving the facility.  Within 4 hours I was struggling to do anything.  I was tired and felt and nauseated, light headed and felt like i was hit by a truck.  The bottoms of my feet hurt and I had stabbing pains so bad in my knee joints I could barely walk without assistance.  I felt very ill for about a week after the shot but the headaches continued constantly for over a month but aren't daily anymore even though I still have them, and the fatigue was getting worse and still is a problem to this day. Once I was feeling a bit better my right knee started to give out and my left knee was cracking. Since I got that vaccine on 3/6/21 I have had back to back problems.  Below is a quick list of these things that have occurred by dates: 3/30/21 - Constant headaches since the vaccine and ear pain and throat issues.  4/16/21 - Right knee giving out on me that started shortly after vaccine and gotten worse.  X-ray and physical therapy ordered.  4/22/21 - Shortness of breath, back pain, constant fatigue.  Blood work that showed elevated D-dimer then chest x-ray and ct-scan ordered. 4/26/21 - Ultrasound for nodule found on ct-scan. 5/4/21 - Biopsy done of mediastinal mass. 5/11/21 - Physical done for surgery. 5/24/21 - Surgery to remove mediastinal mass, right side of thyroid, two parathyroids and lymph nodes. 6/1/21 - Follow-up for surgery.  When I asked why this happened, the doctor said we may never know but the biopsy of the right thyroid nodule result showed thyroiditis, Autoimmune/Hashimoto's, and  that my immune system attacked my thyroid.  The doctor said she tested me for that in 9/20 and it was negative. 6/2/21 - Left knee pain.  About 4 days after my surgery on 5/24 i turned towards the door and heard a loud pop in my left knee.  It had been crackling since the vaccine but wasn't giving out like the right one. I couldn't walk on it at all and was using crutches.   6/9/21 - Mri on left knee showed medial and lateral meniscus tears.  Referred to Ortho Dr. 6/28/21 - Test thyroid levels post op.  TSH levels high.  Referral to Endocrinologist. 6/30/21 - Left knee treatment, cortisone shot in knee for now to help with pain and inflammation so I can function and physical therapy.  Since then my 4th toe on my right foot has been numb for almost two weeks.  I am scheduled for numerous future physical therapy appointments and doctors appointments.    Then to make matters worse I just heard 2 days ago that J&J is having more issues and mentioned autoimmune and wondered could that be what caused all of this?   I regret getting that stupid J&J vaccine.  I expected it to he the Pfizer because that is what was there 2 days before I got my shot.  I told the person I didn't want it and she got someone in charge to talk me into it.  I should have walked out of there and I am mad at myself for caving to this woman.  If J&J says we need a booster I will refuse to take it.  I don't know if the vaccine was what triggered all of this but I find it quite odd that all of this started almost immediately after I got that vaccine.  Not only to me but also to my sister who got it at the same time.  She fell within 30 minutes of getting that vaccine and 3 more times that day, and has had and is still having numerous problems that mimic mine, such as issues with her feet and legs.  She struggles to walk and is having issues with her thyroid among other things that she wasn't having a problem with prior to the vaccine. This is just the short version of all I have been through.  Any questions feel free to contact me.