SEVERE back pain😭

(I'm 19 weeks) Yesterday I woke up to my back hurting just a little, like I slept on it wrong. It was in one spot on my left side closer to my spine. Then an hour later it got worse so I decided to Take a hot shower, 3 hours later and I'm crying from how much pain I'm in. I thought maybe it could be a kidney stone (I've had 2 in the past 5 years) but it didn't feel the same. We decided to go to the ER. They ran blood and urine tests and a ultrasound on my kidneys. Blood came back normal and they couldn't see any stones on the US. But my urine came back nasty, filled with bacteria. They diagnosed it as bladder and kidney infection with an UTI. I had one dose of morphine and some antibiotics and they sent me home. Later that night, the medicine wore off and it felt terrible again. I called my OB and she said to take a warm bath and I can take tylonel and 600 mg of ibprofen once a day. Luckily after an hour the pain stopped before I had to resort to the ibprofen. And this morning I don't have any pain. Fingers cross that it never comes back😩. Just thought I would share my ER story in case someone else goes through the same thing.