My name is Courtney I'm 17 years old and have a boyfriend that is 20 and we have been together over a year now and I want to know why I am not pregnant... I have an irregular period,we don't use contraception as we were both responsible enough to get tested for anything and we both came up clear... He ''cums'' in me all the time but am I not pregnant is it because of an irregular period or could it be his sperm? I do have sex straight afer my period, when I do get it, but I am still not pregnant... can someone tell me why and if I can get clomid at my age??