AM I OKAY!! HELP!

So this past month has literally been a living hell for me. I’m not on any type of birth control, and I had unprotected sex on June 19th. HOWEVER, my partner did NOT finish inside of me, he pulled out. Being that this was the first time I had sex in a very long time, I was automatically concerned about being pregnant. I have cried myself to sleep some nights, stressed myself out to the point where I felt sick, and have been constantly extremely worried. My last period was May 25, and I have yet to start my period. I took a pregnancy test June 28 and it was negative. Took another test July 8 and it was negative, and another July16 and it was also negative. What is wrong? I know I’m not pregnant based on the test, but is it the stress causing this?? Please reply.