Am I pregnant?

So I had sex with a condom but he lasted for hours and then decided to try without a condom to see what it felt like Bc he’s never done it before. (We’re both 18). He came on the bed and touched his cum because I said omg feel it’s on my stomach and began to finger me while the cum was on his fingers without thinking. 2 days later I took the plan b pill to be cautious. Since then we’ve had unprotected sex but he pulled out minutes before he had to cum and I would just give him head so he could. But I think I might be pregnant because I missed my period completely last month and I had a very light period a couple weeks after the plan b pill but it would last like 2 days and it was hardly there! I took a pregnancy test 3 times all came out negative but they came out negative straight away and I didn’t give it time I just through it away after seconds.