I need some great advice please. On March 23rd I had my very first experience with a guy but it didn't go as planned. The tip of his penis didn't even enter my vagina because that would've been the first time that something would be up there. I freaked out. His finger wasn't even able to enter it. He ended up giving me oral sex. No penetration or cum occurred. I've had 3 periods since the incident, March 28, April 15, May 14th. I'm always overthinking that I could still be pregnant because of that day. I've taken over 15 pregnancy test and they've all been negative. My period was suppose to start 4 days ago but still no show. Please help