Worried.. =(

Hi girls my bf has been in jail 8 weeks. The last time we had sex was 8 weeks ago. I’ve had 1 period and now I’m 5 days late. I haven’t been with anyone else and he’s saying if I do a test and I’m pregnant he’s leaving me. I’m so scared because I haven’t spoke to another man never mind slept with 1. Someone please help and give me your views. The longest my cycle has been is 37 days and today it is 37 days and no signs. I’m worried sick.