UTI gotten worse

Ankita
I have a UTI and I have started the antibiotics but I think I'm getting worse. I've been quezy all day and unfortunately gassy too. I threw up late this morning and ever since then I've had this pain in my sides.  It starts at about my waist and goes down my back. It kinda feels like someone has been squeezing my sides and won't let up.
Has anyone ever experienced this?