What Causes Prolonged Vaginal Spotting Post An Intercourse?

Ok I m kindof embarrassed asking this but a week and half ago I lost my virginity. We did not use protection and I am not on birth control but he pulled out. My period was a week late already so I wasn t worried about getting pregnant. I spotted for a few days after then started my period. I am 29 and my periods always follow the same pattern. This time it was bright red blood and I only bled heavily for a day and a half. I have been spotting red blood since. This isn t normal for me at all. What I m wondering is if that s expected for a period following first time sex. i can t just go see a doctor anonymously or go to the grocery store and buy a pregnancy test. I live in a small community and come from a large and well known conservative family so I want there to be a genuine worry before I do anything like that.