I had no benadryl but luckily I found some zyrtec which really helped me out. I had so many hives, I looked like a monster.
I was really worried about the chest pains though. The pain was focused right in the middle of my chest where the sternum is and would occur every couple minutes and last around 5-10 seconds. It was excruciating and really felt like something was squeezing my heart. I've never experienced heartburn that bad before. I was thinking it might be acid reflux but I'm not sure.
Oh well, It passed now but the pain in my chest is still there, but it's very subtle now and less frequent. I guess I'll be seeing a doctor about that soon.