Scared I’m pregnant

Sometime in late December/ early January the guy I was with and I somewhat attempted sex?? It was my first time and we didn’t use protection (I know it’s stupid pls don’t lecture me). He started to put himself in me and it was hurting a whole lot more than I expected so I told him to stop. I don’t know how far he got in before he pulled out. I started to get really sick a couple weeks after and I didn’t make the connection that I could be pregnant. I’ve been getting nauseous every time I eat, dizziness, fatigue, sporadic fevers etc. My mom asked me in late January if there was any chance I could be pregnant and I panicked because that thought never occurred to me. I lied and said no. 2 weeks ago my dad asked me again because I was still sick and having pregnancy symptoms. I have had a period since then, but it was really light. I took a pregnancy test that night my dad asked and it was negative. I’m scared that since I don’t remember for sure what month it was that it still could have been too soon for the test to be accurate. Could the test have been wrong? I don’t want to be pregnant, but I’m really terrified I am. I typically have heavy periods. I was supposed to start my period a few days ago, but it’s so light again that it doesn’t even seem like a period. It’s just spotting.