I was urinating a lot and i was feeling dizzy. but it is mostly gone now but, only thing different now is my left lower back now hurts. it been like this for a week. i mostly feel it when i walking around. when sitting i don't feelit?

I answered this question before. If pain is relieved with some position and exacerbating with certain activities, pain is likely due to a muscle strain, joint or nerve pain, not due to internal organs such as urinary system or bowel tract. If pain has persisted for one week you should see a doctor because most of the common problems I noted above, if simple, should be resolving by now.