Recently I have been having protected sex 1 to 2 times a week. He always uses a condom and pulls out before he cums. But some times he cums on me and it landed on my legs. I am about 5 days late and I always have my period on the 20th it has been like that for the last year. I have been going threw stress lately but last time I was majorly stressed out it didn't affect my period at all. I am worried because my parents would kill me and disown me if I did get pregnant and I am only 18. Could the amount of sex I am having affect my period since it's only been going on for a month and I am not used to having sex that often.