Suggest Remedy For Severe Lower Back Pain

I stomped my right foot so hard few weeks ago and it hurts my lower back and i feel like my lower back is full of air that i want to pass gas but i cant. My primary care dictor told me to put ice but i put hot instead. For couple weeks i was fine til last week my lower back hurts again and until now. My back is full of air that circulates in my lower back and it hurts but if i pass gas i feel relieve and the pain goes away. It s been a week now that i have this feeling. Im thinking of going to see a doctor of physical medicine and rehab about this because i dont feel comfortable so she can give me proper treatment.