Hello, I Am A 19 Year Old Female, And I

Hello, I am a 19 year old female, and I have been experiencing bladder issues for the past three or so months. It began with just a general uptick in how many times I needed to visit the bathroom, but given I drink a lot of fluids, this didn't bother me. But recently, there is now an almost unending urge to void, more than two times an hour if I don't hold it. There is no pelvic/urethral pain, just a tiny sting when the urge starts in again which I normally attribute to having to urinate. I had a urinalysis done as well as blood work, and they both came back with nothing. I don't need to get up during the night at all to urinate, it's just during the day, and it's very distressing as it interrupts my day to day activities and this, in turn, has made me very depressed. Is there any explanation for what this could possibly be?

Thank you,
Sarah Miller