You might wanna drink more water, it can be an uti. if when you go pee it feels like you still have your bladder full that is a sign of an uti. I had an uti In the beginning of my pregnancy.
This has happen to me, I'm currently 17w,4d but for me it happens during the night I notice this when I wake up during the night to go to the restroom. I thought this was because of the way maybe I was sleeping our because of the me taking too long to go to the restroom in the night.
Sometimes if you have a uti you can't get all the urine out so it will feel like ur bladder is full all the time. If you have a uti treating it is important because it can cause preterm labor. I would see ur ob as soon as possible. In the meantime drink lots of water and cranberry. The cranberry helps to flush the bacteria. Good luck.