21 days late 54 cycle

Naomi • 19💗| IL🌽 |

My period is late by 21 days. My average cycle is 35. This is the second time my period is late. My boyfriend and I tried to have sex for the first time but it didn’t go as planned. We used a condom, he tried pushing the tip in but I chickened out. He never ejaculated or had any precum. I’m only 19 years old. I did 5 test but they all came out negative. I can’t be pregnant right? Also we tried it right after my period ended.