I Think I May Be Allergic To Ragweed. I Went

I think I may be allergic to ragweed. I went to the ER a few days ago with swollen skin on my face, eyes, and had hives from head to toe that were very itchy. My tongue was also swollen a little affecting my speech. The ER doctor immediately administered IV steroid. I was outside briefly about 90 minutes ago and my eyes are starting to feel itchy. I am hoping the single Benedryl and single Pepcid that I just took will be sufficient. I also have Claritin. Should I take a Claritin as well?