question: I had a severe allergic reaction to an ant bite about a week and a half ago. Blood pressure dropped to 70/63 and was rushed to the ER and was given loads of Benadryl, went through 2 bags of fluid and had to be put on oxygen. I m still very tired though, I have this running exhaustion feeling. My question is- how long is this supposed to last? Is it normal for me to be feeling so tired?