Hello 15 going on 16,
WELCOME to this forum!!!
Sorry to read about your back pain. It is always frustrating trying to figure out what caused or is causing the back pain. Most of us have been there.
Okay, where do you go from here? It has now been seveal months and the pain isn't getting less, it is getting worse. Seems like the next step is to see a doctor, and in my view a doctor who specializes in spine problems, such as a neurologist or spine surgeon. Do a little reserch and try to find the best doctor you can.
Do stay in touch and let us know how things are going for you.
Oh yes, one last thought - Does your mattress sag in the middle? And if I may ask, how old is your mattress?
Hope all goes well.
RichT