Please help?

So I just recently finished my medicine for an acute uti (which made me nauseous and vomit at least 3 times during the week of antibiotics). However, I am not sure if it has come back or never cleared up at all. For Sunday-Monday and most of Tuesday I was constipated. Accompanying the constipation is/was a discomfort/dull pain in my lower abdomen/bladder area on both sides. I can feel it if I take too hard of a step, walk too fast or even when I'm sitting sometimes. I'm not sure if it's because of when I was constipated, like did I pull a muscle? I don't know how likely it is that I did. I also happen to have lower back pain that came back Tuesday (I had it with my uti). Now my lower stomach/bladder area/abdomen feel hard/tight. I was wondering if I could get any insight. Please? Thanks!