Sharp pelvic pain w/nausea, sweat, & dizziness. dr says tender cervix & enlrgd uterus. went for ultrasound & obg in a few days. what could this be?

A few ideas: Sharp pain with nausea etc., could be a sign of endometriosis or adenomyosis, especially with enlarged uterus and tender cervix. Could also be an infection like endometritis or STD . The approach for these are hormonal and antibiotics, respectively. Both are a little tricky to diagnose as well. Make sure you're not pregnant or dehydrated, first. Doctor may recommend a biopsy to diagnose.