What could this be?

Hi all,

I have been having discomfort in my belly a little below my belly button and my pelvic/ ovary area as well just on my right side.

I’ve made an appointment to get blood work and a sonogram done this Thursday but am so nervous it could be something not good. I am trying not to google diagnose and research and freak myself out. I’ve been having the pain lightly for a few weeks in my stomach but it’s just recently felt a little worse. I am ovulating right now and usually do have pretty intense ovulation pain. My lower back has been getting spasms every now and then as well that just started a few weeks ago. Other than that I’ve been feeling normal.

Sex can sometimes be painful but my cycle hasn’t been off or anything. I’m scared it may be endometriosis or pelvic inflammatory disease or maybe something more serious?

Any thoughts- if anyone has experienced these symptoms before and what it could be? Thanks?