I am 34yr old w/f and have 3 children My

Patient: I am 34yr old w/f and have 3 children. My youngest is 4mo. I have recently developed the constant urge to urinate, bladder pressure, feeling like my bladder isn’t emptied, and stress inconvenience. I’ve been tested 2x for uti with no bacterial growth. It is worse when lying down or sitting. No additional symptoms that I can think of. My friend thinks I have a prolapse bladder. I have an apt with a urologist. Any idea what may be going on?