hi i have a baby who is 14wks old, i got my period back when she was 10wks old. but my second period hasnt come yet. in the last three weeks sex with my partner has been really painful, if feels as if there is something in the way, and i gat a sharp pain in my stomach. i did my pelvic floor exercises and i havnt had any problems with going to the loo. i have done two pregnancy test to make sure that i am not pregnant and they both come back negative. where has my period gone and why has sex got really painful?