Help!!!

So basically I had sex with my boyfriend, we’re both 17, without a condom and I’m not on any birth control. It was a day before my fertile period and it says 7% chance of pregnancy. I didn’t want to take the morning after pill because I didn’t want my parents finding out and it was just effort and money to get it. I feel stupid for doing this now and I should have got the pill. I’m worried I could be pregnant but I’m on medication that means if I am pregnant it could cause a miscarriage and have serious side effects. I don’t want to go to the doctor because then my parents would find out and I’m really freaking out. Any advice??