Pain on my right side.....

I am assuming it's round ligament pain, but this pain has been going on for about 4 days! I've tried to stretch, I've tried to lay on my left side to keep from the straining feeling, but it honestly feels like I nerve is being strained or a muscle pulled. Also it is tender when I push on where I'm hurting at to relieve the strain! I'm making an appt tomorrow because it is really stressing me out, but has anyone felt this before??? I'm 18w2d and I know baby getting bigger cause ligament pain, but I thought it would stop and at least come back but this is bothers me on and off in my day especially at night and in the morning!