Bad back and cramp like feelings

Hi ladies,

Is anyone else having cramp like feeling/bloatness and back pain?

I stopped my pill back in September and we have actively been trying. I used a clearblue fertility monitor this month and had sex on most of my high days and I had 2 peak days which we had sex on. Last two days I've had the worse back pain and crampy feeling in my belly, Im not looking to much in to it I'm just in PAIN. Since this baby making lark started I haven't felt myself with putting on weight from stopping my pill I'm sure of and now this. Anyone else had it? Thank you