After 5 weeks of taking Yaz, I have developed hives, "lobster red...

After 5 weeks of taking Yaz, I have developed hives, "lobster red" skin and itchiness from my ankles to my knees. The itching is was so bad, I was using a metal hair brush to scratch (I know, not good). It turns out, I'm allergic to Yasmine. Hives is one of the first side effects. I stopped taking Yaz about 3-4 days ago and the hives went away completely last night (my doctor told me yaz stays in your system 7-10 days). The doctor also told me, if you do develop hives on this medication, you need emergency help. Hives can spread very very quickly and they can obstruct your airway. I personally did not go to the emergency room (I didn't know any better), I was able to control them with Benadryl. I am sad I can no longer take this pill. It was awesome. It took away my appetite, no moodiness, no pms, no weight gain. :-(