Hello. So Last Month My Partner And I Had Intercourse

Hello. So last month my partner and i had intercourse and it was unprotected but, it was only in there for about 15 seconds and he didn't ejaculate and he pulls out like waayyyy before. well my period was supposed to occur November 20-23rd, and it didn't come and still hasn't. shortly after i believe i had a yeast infection my discharge looked like cottage cheese and it was during the time of my period. it lasted for about a week and a half. well now i call feel my cervix which is very high and open and also slightly firm. i have no pregnancy symptoms what so ever i just missed my period. i am very religious and too young to have anything right now i have been praying every single night and i still have hope i just need answers please.