4th day of being in agony!!

Hey ladies, I posted the other day about being having bad belly pains. It's constant and doesn't go away. I've now got a dull pain in my lower back and slightly sharper pains in my upper back. This is the fourth day now 😩 I saw an out of hours Doctor the other day that said I've got a wee infection and that I should be ok. She said its either that, my appendix 🙄 or an eptopic as well as normal pregnancy. I don't think it's any of these things. All I know is I'm in agony. Any suggestions?? Also 8 weeks pregnant!!