Kiney infection/stone?

For the past few days ive been having some pretty bad pain. I was just chalking it up to round ligament pain, but after today, im not so sure.

Its only on my left side but i cant tell if its in my front or back. It hurts pretty bad and now im having to push kinda hard just to pee. When i do pee, its not much at all. It doesnt hurt or burn, just hard to get out.

Help?

May not be enough info, im just looking for some kind of insight. I will call my doctor in the morning.