What Causes Bleeding Post Intercourse?

i am 24 years old. i make out with my bf weekly. and 2 times i took i pil also as it was nt safe sex. i didnt faces any prb bt this time aftr making out very next day i gt bleeding and my periods date is 10 days frm nw. is im facing any prob and bleeding is nt very heavy nt even very light bt normal