About 8 weeks ago, I was fingered and then given cunnilingus by a guy. He kept his jeans on the entire time. This was my first time doing anything sexual and I am 18. The day after this happened, I started absolutely FREAKING out. At first I thought that I must be pregnant (which I know is an irrational thought) and I got the worst indigestion, because I know that indigestion is a sign of pregnancy. Then when I finally got over that fear, I got really freaked out over the possibility that I had contracted HIV. Now, I am not talking just a little scared, I am talking I want to kill myself because I know that I am going to die kind of fear. I have been soooo anxious and stressed. This is CONSTANTLY on my mind. About 3 weeks after this sexual encounter I started to get an itchy feeling in my vagina and some weird discharge. My period came about 1 1/2 weeks late and lasted for only like 1 or 2 days. It was really weird. Then the itchy feeling went away for awhile. I have had spotting this month (brown and red) and cramps that feel like menstrual cramps.Now about 8 weeks after my sexual encounter I am getting this same itchy, burning feeling in my vagina, but I have no discharge. Could this be an STD? What STDs can you get from receptive cunnilingus? Or could I just be convincing myself soooo much that I have something that I am causing this? Please help me!