Ectopic pregnancy?

I think I might have an ectopic pregnancy. I’ve been cramping horribly on one side of my abdomen, pretty low. My doctor appointment isn’t until Feb 28th, he won’t even see you until you’re at least 8 weeks. What should I do? I’m not bleeding, so I don’t know if I should waste time at the ER, but I’ve tried calling the nurses line at my doctors and they’re telling me if I’m not bleeding, I’m probably fine. I just feel like something is wrong, and I want a peace of mind. 😔