Morning of vaccination I took a Benadryl 25mg and a zertec 10mg, because I was a little worried since I have previously gone in to anaphylaxis when starting immune boosting allergy shots, at my allergists office.  I took another Benadryl at 5pm that day and 20mg of zertec the evening of the 5th along with my normal medications. Other than a headache and a very sore arm, everything seemed fine.I was happy to get vaccinated.  The morning of the 6th I had planned on taking a Benadryl and zertec again, but got sidetracked and forgot. I had taken my normal morning thyroid pills, and drank my morning coffee, nothing else out of the normal. Nothing to eat, everything was fine until 11:30am (26 hours after vaccination shot) I noticed my throat & tongue starting to shooting pain and then starting to swell. I immediately took a Benadryl & zertec, took my albuterol inhaler and grabbed my epic pen. 15 mins later my pulse was at 139bpm (according to my iWatch) and I felt like I was going to pass out. I auto injected with epic pen, but didn?t know to hold it for 3-10 secs, so I didn?t receive a full dose of the medication. My heart rate started going up again and I was having to focus on my breathing and called 911. An ambulance came and I had to give myself another Epi Pen injection as I couldn?t breathe. The ambulance crew (two people -were not EMT?s and just a volunteer crew), so I had to inject myself, as they watched and I pulled the epi Pen away again, which I learned from them was incorrect to do. Just the little amount of medication I got from the Epi Pen semi calmed things down for around 20 mins, then 10 mins away from ER  - my HR went up to 149bpm (I was informed by ambulance attendant and verified with the heart monitor on iWatch later), I was fighting unconsciousness (was told by attendant my BP dropped out and I lost all my color) and could not breathe. I went limp and couldn?t hold my head up, the attendant helped to support my arm as I auto injected myself with the last Epi Pen, and held it for a 10sec count.   [ER report has misinformation. All of my Epi Pens were expired and I knew this, but its all I had. I also injected myself with all of them unlike the ER report says. For some reason the ER doctor was not fully listening to what had happened (from the ambulance crew and from me) and made mistakes in the ER Report. I have been advised to contact the hospital and address the ER Doc actions and report issues for my visit.]  As we pulled up to ER, the epi pen had calmed most everything down, my heart rate was just slightly elevated and my breathing was still difficult and I had to focus on that. I was administered Steroids and Pepcid AC, intravenously at the ER and was monitored. Then was released an hour or two later when all my functions where at a normal readings.   Everyday since I have continued a course of Benadryl, Zertec, Pepcid AC, albuterol, 200mg Celebrex, and 11mg ER Xeljanz. I have still been experiencing throat tightness and extra phlegm and have also started to take a daily 20mg steroid course to help with remanding allergic symptoms, I have been having as directed by my allergist. I?m hoping the vaccine clears my system soon as it still seems to be affecting my system and my body is very ?hyper vigilant? it seems. My allergist said he does feel it to be safe with the Johnson&Johnson Vaccine (when/if) it gets approved for further vaccinating me, as I have had no issues with any other vaccines in the past.