Pain in groin and back

Me

I will be going to the doctor on Wednesday. Anyways I just went to pee and got back in bed and noticed a pain on the lower left side of my stomach that is radiating to my back and down my left leg. And it still feels like I have to pee even though I just went. I’ve had this feeling before and have even have sharp pains in the same area and I was wondering if this was possibly my kidneys.