Hi Im 24 y/o. I have been under stress for a very long time since I had my first sexual experience (January 8th 2016). There was no penetration however his penis came in a lil bit in my vaginal opening for a few seconds and I took it off quickly since I changed my mind due to fear of getting pregnant (He wasnt wearing any protection either i know its stupid) Also did mutual masturbation. Ever since that happened, I have been experiencing light and short period ( 1 day of somewhat heavy bleeding with clots sorry TMI, 2nd day it becomes lighter, then it ends with light pink and red spotting for several days). My first month of light period was a week earlier while the second month was 5 days late from my expected period. I have taken types of precautions from January to March 2016. I took over 20 hpts and it all came back negative AND even went to my doctor twice to ask for a urine test which also came back negative. I have also gotten blood test 3 times already which came back <2 hcg. With all these negative results, i feel like i could still be pregnant due from experiencing symptoms such as motion sickness/dizziness (been going on since january, Btw can stress cause motion sickness?), bloating, I also feel like something stuck in my throat and heartburn. I am so frustrated and stressed out because of this. My period has always been heavy. Please help me. With all the negative results, does it really mean pregnancy can be ruled out completely? Can a pregnancy go undetected?