Allergic to aspen bedding or the guinea pigs?

I adopted two guinea pigs on the 15th of july. After adopting them I didn't notice any allergic reactions to them(but I wasn't lookin for any for that matter). After having the guinea pigs for a week I bought new aspen shavings and I new bed. From what I remember I cleaned the cage & placed aspen bedding the same day I got my bed. That night I could not sleep, finally I gave up sleeping in the bed and moved to the floor(it was a new bed-just not used to it?) After that I was ok sleeping, it would just take a while(Yes again never noticed any allergic reactions). for that week the 22-27, i spent a good 5 hours during the day with the guinea pigs/in the room(not including sleeping). Saturday morning I woke up with a nettle rash all over(and it was CRAZY!) I took bynedril and after a few hours it was gone. I went to work and when I got home within 30 min of being in my room(that's when i noticed) I was getting a nettle rash again & my throat was swelling up(I had troubles breathing/swallowing/talking.) I took more Bynedril which did not get rid of any symtoms, the nettle rash became worse but the throat didn't. Sunday morning I woke up with a face/body in nettle rash. My lips look like they were just punched. I went to the doctor and he said it was the prolonged exposure to the guinea pigs/I shouldn't be around them or even in the same room because It was a serious allergic reaction. My parents freaked & sent them back to lady from the rescue we got them from until we figured out what it was. they got rid of them sunday night at 630. my hives went away. but by 730 today(monday) I was getting a nettle rash on my back(wasn't really that bad at all). Would it be a reaction to the guinea pigs or aspen shaving? some left over aspen shaving was in my room today and when i went in there I only recieved a headache (maybe from left over urine fumes from guinea pigs?). From other guinea pig owners please tell me what you think. should I try to take them back & buy different bedding and see what happens(yet that may be a risk of sending me to the hospital?) Or should I just forget about owning a guinea pig? (my parents will not let me keep them anywhere other than my room and i cannot rely on anyone to clean the cage for me/take care of them) THANK YOU!!!!!