Period someone help 😟

Hi girls. I have 15 years and a boyfriend for 1 year and 5 months. I never had sex, but in 16 December 2016 we was together and did some things. He cummed and then fingered me. Then 1 week later he told me that he dreamt that I was pregnant, we started to worry becaus maybe the cum entered in my v. But everything was ok. My period came in 28 december and in every month until now; April. Since december we took care, we washed our hands and he didn't touch me just when we was sure there is nothing to worry about. In april 7 we were together but didn't do anything because of what i could be prg. And now my period is late.. Its just 29 i know but I am really scared, it was never late. We didn't had sex. I need some advices please 😢😢