What Do Cramps, Missed Periods And Tender Breasts While Being Off Mirena Suggest?

Hi, I have a question 8 yrs ago I was suppose to have a tube ligation but the doctor decided not to she said that it was better to do the mirena so we did.....they have change it twice, but this past january,2015 they took it out after making sure I wasn t pregnant and I started the birth control lo loetrogen, but I stopped almost 4 weeks now, I been having unprotected sex with my husband, ok so I haven t had my period since I had the mirena and I thought after the removal I was gonna have one but I still haven t, I m cramping sometimes it s very uncomfortable and my breast it s been really, really tender, for like 3 weeks I been doing pregnancy test and all of them have come negative, I don t know what to do, I m reay tired of feeling this way Speciallly how my breast is so tender, we are trying to get pregnant and but again I habet had a period yet not even spotting!