Back Pain

Ni

Currently suffering from lower back pain, especially on the right hand side. I know this can be related to urine infections but my urine was clear on Friday and I finished antibiotics on Sunday. My concern is I’m struggling to move, especially getting up from sitting down and also when I walk. I read somewhere that it can also be your appendix but unsure can’t get doc appoint until Friday but getting a prescription of strong pain relief 😩