Pains Low Right Side

Lucy.
Hi all, looking for some general advise. We've been TTC for around 5 months now, AF is due this week. Last week I woke up with quite sharp pains which came and went at the very bottom right hand side of my tummy/pelvis which I've never experienced before and didn't feel like a normal tummy ache. The pain was manageable, but on and off for a couple of days. I'm now getting the cramps/tingly AF sensation albeit quite early. Has anyone else experienced the side pains? 
Thanks 😊 x