useless doctors

I've been having severe lower back pains for about two months now constantly, n before anyone thinks this, no I'm definitely not pregnant. The pain is so bad I can hardly walk most days, it hurts laying n sitting upright too, I finally went to the doctors last week n my GP made me do all sorts of exercises and stretches n movements to see when n where I'm in pain. None of this hurt my back at the time so the GP just told me to take paracetamol n that's it. As soon as I was up out my seat again the pain had become 20x worse.. Those exercises designed to help me messed me up even more. 🙄 I know if I go back to the doctors the same will most like likely happen again and I'm so frustrated with all This! The pain has spread to my hips n it's causing me constant nausea. No idea what to do next, don't trust me GP anymore