Uneducated 😥🙋🏼‍♀️help..

Here is my story. On April 7 i had sex. He only thrusted 6 times. He had a condom on the whole time. And he never ejaculated in me because it was only 6 trusts. I was believed to be near or on ovulation. I panicked and took plan b, 7 hours after. I started spotting a week before my period. And then the day before my period was supposed to come i had large clots so I assumed it came early. The large clots lasted 4 days and i had spotting the last two. I took a pregnancy test 20 days after sex and a week after the period started and it was negative. I know some people bleed in pregnancy which makes me nervous. Could i still be pregnant based on my situation