Hi i am Dr Ahmed Aly
thanks for using HealthcareMagic site ,
I had gone through your question and understand your concerns ..
In my opinion i think it is a muscular
sprain usually due to heavy lifting , over exertion ,
cold weather , bad sleeping or sitting postures .try to have rest and relax your back muscles and minimal stretching or straightening exercises will be helpful .
You may take painkillers like
advil tabs when needed , hot gentle massaging with topical anti-inflammatory , muscle relaxants , back patches will be effective in most of cases .
If pain persists i recommend you visit your physician for proper evaluation and management .
Please click and consider a 5 star rating with some positive feedback if the information was helpful. Wish you good health,
Any further clarifications feel free to ask.