Pregnant

This is probably stupid to be worrying about but I stress about everything

I’m 18 years old and I lost my virginity earlier this month. My last period was the 6th and I lost it the 11th. We didn’t use protection. We’ve had sex several times since and have used protection some and none at other times. I came the other day and the liquid was brownish... I’m not supposed to get my period for another 7-10 days but I’m worried because we had sex during ovulation and I’m not sure if we used protection... and because of the color of my fluids

I know I’m probably over reacting but I don’t know what it means my highschool didn’t have sex Ed and I can’t get on birth control because my parents are too strict.