Implant

Hi was just wondering if anyone has experienced the same thing I'm going threw I got my implant (rod) out on the 7th I haven't had my periods for over 3 years now and I'm just wondering when they will come back as I have had sex with out the implant in but I am now on the pill but I have been having really bad pains on my right side pelvic area and a sore back on the same side