Implantation?

Jo • 🌈 I'm 33, my partner's 39 and we've been TTC for our first baby since March 2017. We found out we were pregnant on Christmas Day 2017, but miscarried with surgical management on 31 January. Hoping for our rainbow baby x 🌈
We've been TTC for our first baby for 3 months (I'm 32 and my partner's 38). I've had a dull/ache cramp sensation on and off for 7 days now - AF due in 5 days' time... could it be implantation? I've come off the combined pill and wondering if I'm just being optimistic and it's actually to do with that?! Love to know your thoughts 😊