i had implant in after 7 children i had it in for 3 yrs then had it changed i had new one in for 8 months then had it removed after i met new partner this was jan 2010 i still aint got pregnant and my period cycle has changed to 26 day cycle and recently again to 28 i was 30 before implants i have numbness in injection site and pains can someone help understand whats going on