hives

I am a 60 year old woman in very good health. I have had hives for 10 months now. it started last winter with terrible scalp itching after I took myself off claritan because I didn't think I needed it anymore. I suffered from winter asthma for years but thought with a change of diet I had it under control. The itching scalp was accompanied by a weird lump in the throat sensation and I guess very mild asthma. To make a long story short I still have the hives, no asthma, and now i am trying the homeopathic route. About two weeks ago i started taking 3000- 4000 ml of Vit C over the course of the day. This seemed to act like claritan and suppressed the hives somewhat (at least as good as the claritan did). Two days ago I bought Urtica, apis and histaminium hydrochloricum each in 30 c dose. I didn't really know what I was doing - I took the apis and urtica together and had already taken the vit c by that time about 3000 ML. I felt good, i felt hot but no hives (typically red welts with white centers all over mhy trunk, sides, legs and arms of varying degrees)(usuaslly accompanied by a perspiring and hot face / chest in advance of the welts and itching). two days ago i did the same thing and became very sleepy and slept for about four hours with rather violent dreams. I woke up and after more research i took the apis every four hours -5 little pills each time- i did this every four hours. i also took the vit c. at 6 pm after three doses of apis five pills each i got terrible hives all over - it was so bad i almost took a claritan but didn't. it went away after a few hours. this morning i woke up with terrible scalp itching, lump in the throat and mild asthma! the same symptoms I started with last November! I continued to do research and found this site. today i took one does of apis fell sleep again and woke up with another terrible case of hives. i think i am healing but now i don't know what to do. am I healing or am I overdoing the remedy? where do I go from here? is it ok to keep taking the vit c? do I have the correct remedy? he scalp itching and lump in the throat went away after several hours this morning. thanks for your help!