Leaning to the left, huh? Have you considered TV commercials until this subsides
Not medically qualified but it does sound like your muscles are in spasm and grabbing on your left side. Also agree, heat has never helped in that area for me, only ice. Pain meds are good, muscle relaxers (Torodol per Maria) are better along with anti-inflams if ice helps.
Hope your doctor calls back soon. Even orally, Torodol can help quickly.
Good luck, Dale