Hi Danni ☺
I'm no doctor but I've been a woman all my life lol
My first guess would be UTI. If it is one starting I'd drink lots of water or cranberry juice.
I would think if it's OAB it doesn't start suddenly, I could be wrong. If it is there are several remedies for it.
Your urinary urgency can be caused by different things. In any case, drinking lots of water is a good thing anytime.
I'd get to the doc if it lasts more than a couple days. I hope it's nothing serious.