So two days ago, I had a casual encounter that after reading a fair amount of posts I think I maybe over thinking but here goes. So to days back I got fellatio for about 20-30 seconds and also fingered (pretty intensely) a random guy (stranger in passing restroom quickie) so afterwards when mind clarity set back in, I noticed a pin prick sized cut on my finger that I remember from a day or so back, there was however very little residue on my fingers (thumb and forefinger, cut is on the forfinger) a washed hands immediately after vigorously when I noticed the cut. It's literally the size of a pinhead and was for a day or two before, what are the chances I could have exposed myself to something serious (HIV, HEP A,B,C, etc.) please any feed back would be appreciated. Am I just overreacting? Or should I get tested.