We had intercourse for our second time, and I am still not comfortable. Now, I have some signs of pregnancy

Im 16 me and my boyfriend just had sex again for our second time he try to make me feel comfortable but im still not on a comfortable stage yet , i know he nutted in me because he started to tighten up on holding my hands , then i asked him he said he dont know i have signs of pregnancy but i dont want to know for sure because im still in school , still under my mother roof and still not where i want to be in life but i dont believe in abortions so what should i do ?