Scared if I’m pregnant

I lost my virginity on the 29th/30th of September and I didn’t use a condom and I’m not on the pill. He didn’t cum inside me and didn’t cum from it because I stopped it before he could, but it’s all I can think about. I’m so scared because of pre cum and there was other times that the penis was touching my vagina but didn’t go in. I haven’t got my period yet but it’s due this week I’m just really worried. I’m under age and I don’t want my mum finding out so if I get pregnant I would get rid of it but can you do that without your parents knowing? I haven’t taken a test yet because it’s only been 2 days since it happened and it wouldn’t be accurate. Also if I get my period could I get pregnant after it if the sperm was still in my body. I hope this makes sense, I also love my boyfriend and I don’t regret it just wish I was more sensible.