Hi honeybaby,
note: sorry, I just saw the edit on your symptoms, I would get to the er if your lower back is hurting, that sounds more like a kidney infection. I'm not a doctor so I don't know for certain what you exactly have but I would say get to the er to be safe. I'll pray that everything goes ok, hugs!
Since I get Urinary Tract Infections & Kidney Infections so much what I do is go to the store and for $10 you can by AZO test stripes to determine if you have an infection, it cant tell you if it's a uti or kidney infection, if it comes back abnormal then you know it's one of the two. If these are the only 2 symptoms then I would say it might be more of a uti. If you have a kidney infection your lower back side would be hurting(like a stabbing knife feeling), you would be running high fever, your body aches, nausea and chills, feels very similar to the flu. If you start feeling this way you have no other choice but to go to the ER, it can be deadly. A UTI, will cause burning, sometimes pain while voiding, burning while voiding, it can hurt down there, abdoman can hurt, a temp that is 100 or lower....sometimes you can have one or all symptoms. What you could do in that case is drink lots of cranberry juice for about a week(the more percentage of cranberry in the juice the better, look on the back of bottle to see). It can help make a uti go away as well as relieve the pain and burning that you experience while voiding. Drink water to flush out kidneys and bladder, no sodas, cut sugar and acidic foods. Azo does have over the counter pills that will also help make it go away. If you tried and it hasn't gone away or it gets worse you will have to get to a doctor or er where they prescribe antibiotics. Hopefully it will be something easy for you to treat and not something else. There is always a chance that it might be something not mentioned but at least you can start off trying something to see if it helps. I hope this helps and hope that you can start feeling better soon sweetie.