Me and my bf had sex 3 times already and I'm on birth control and I've been taking the pill correctly everyday for 6 months and I'm not on antibiotics or anything he also pulled out every time even though pulling out doesn't work my period was supposed to come Sunday and it came yesterday but it onl...

I had sex on Friday and Saturday but I have been taking birth control for about 6 months now. I stared the brown pills Sunday and I usually get my period Monday but it hasn't came. Usually when I do have sex it's late but it still worries me. I just want to know if this is normal. Thank you.