Why would my lower back be hurting so much for me to have to use a heating pad?

Rebecca

I know that I’m supposed to be getting my period in a few more days and I know that I’m still on my birth control patches and so I know that I haven’t missed a period yet and so is it possible to have such lower back pain that all I want to do is just hit something or lay down on a heating pad to get relief from it? The ibuprofen that my neurologist prescribed me helps but it didn’t start up until after work today.