About five days ago, I was touching my boyfriend.. "down there." He had his underwear on, but I noticed three small drops of either pre-ejaculate or semen near where the tip of his penis was. I must have touched them because I was running my fingers along there. Right after that, I went upstairs to go to the bathroom. I had NOT washed my hands first, and I wiped. I am only sixteen, and this was the first time I have ever done anything sexual with him. We have been together almost 2 years. I am also TERRIFIED that there is a chance I could get pregnant from this. The drops on his underwear were small, and I when I went upstairs, there was absolutely nothing noticable on my hands AT ALL. I couldn't feel anything either. The day that happened, I was on my period. It was day two of bleeding. Yesterday, my period was very very light, and it was obviously nearing the last day. Today, there was no bleeding at all. But I just went into the bathroom, and there was very dark brown looking discharge in my underwear. This has never happened before, not that I can remember at least. Am I paranoid?