Zoloft and yesterday morning

After years of dealing with social anxiety disorder and panic attacks, I was prescribed 50 mg of zoloft yesterday morning. i took my first pill at noon during lunch, and I felt naseous/exhausted throughout the day, but knew that it was a normal side effect and didn't think much of it. This morning I woke up with my face, chest, arms, and neck COVERED in hives. My face looks like I've got horrible acne. I went straight back to the doctor and she gave me a medicine to calm the reaction. I was unaware of any allergy, given that this is the first antidepressant I've ever tried. It's disappointing, though. All this waiting, and all I got out of it were a bunch of hives and nausea. Any one else have an experience like this?