How do you distinguish between fibroids and potential endometriosis ?

I’ve had sharp pelvic pinches/pains throughout my cycle here and there, mild-moderate cramping throughout my cycle, and nausea before starting to spot for my period just now. My periods are generally pretty heavy. My mom had fibroids, but no family history of endometriosis. I can’t get into my gyn until the 10th, but I’m worrying myself over google. Anyone ever been through anything similar?