Hi. I May Have An Sti. After Flu-like Symptoms, I

Hi. I may have an sti. After flu-like symptoms, I started getting muscle and joint pain. This pain is servere. It’s a soothing pain all over my body every second. I also have started getting sharp abdominal pain. I’m waiting on test results. Is there anything I can do for this horrendous pain and what sti is associated with my symptoms? Thanks