UTI antibiotics

Nothing • 20 ✨ Christopher born 7.27.2016 💙 happy 💗🐰🐱
I'm being treated for UTI and I'm 11w5ds pregnant and I'm just wondering if it's normal for my back to hurt where my kidneys are? The hospital did an ultra sound on my kidneys when they checked the baby and they said I came back negative for kidney infection. My back hurts though. 😭 could it be the antibiotics?