Help! My UTI turned into a bladder infection and I'm in excruciating pain

So I went to the doctor today and it turns out that my UTI has turned into a bladder infection. They found a lot of blood in my urine sample; so much that they asked if I was on my period. They started me on antibiotics, so hopefully they start working. The only relief I get is when I’m sitting on the toilet, but even still, each small drop of urine feels like a drop of lava. Once I stand up, I feel as though I’ve been holding my pee for days. I can’t even lay down because it hurts so bad. At this point I just feel like I want to rip my bladder out! It hurts so bad, I can’t take it. I just want to curl into a ball and cry.