Took Yaz for one week and on the 7th day, started to develop a ho...

Took Yaz for one week and on the 7th day, started to develop a hot hive skin reaction. I've never been allergic to anything and was unsure what was happening. As I didn't think it was Yaz, I took an additional dose that Sunday evening. I woke up the next morning with hives covering 50% of my body (first day on the new job, no less). I went to the physician and got prednisone to help with the inflammation, but by the next day, the concentration of Yaz in my system kept rising and I ended up in the ER with two IV treatments of an antihistamine complex and an increased dose of steroids. It took me over a week on the prednisone to finally overcome the symptoms and not have flare-ups at night. I've tried looking online and haven't found any other reports for Yaz allergies. Since I've been on the same pill for 9 years, I was curious as to what the cause may have been. Has anyone else heard of Drospirenone alleriges? It's the progestin that's in Yaz... the only BC that has this formulation.