Cramps all month long

I’ve been having full achy like cramps for a few months now. It feels like when my period is about to come but the pains never go away. Most times I feel them on my left side and then sometimes all over. My periods are on time but a little heavier since this has been happening. I have an appointment on Friday but I’m scared as to what they might say. Does anyone else get these cramps all month long too?