Suspected ectopic pregnancy, when to visit ER

I’m ten days late on my period today and I’ve been getting faintly positive tests for about three/four days but my lines aren’t getting darker. Someone here suggested it may be an ectopic, because she went through one an had similar problems with tests, and I should get to the doctor. I do not have an OB yet, I know I should, but here we are. It’s 5pm on a Friday, no where is going to open until at least Monday and even then I won’t be able to get in day of. What should I do? I am having some cramping but nothing unusual for the beginning of my previous pregnancies. I don’t want to waste space in an ER but I also don’t want to be rushing to the ER if I need one if I can help it.

Should I wait it out or better be safe than sorry?