I need help please!

Al • Trying to navigate my way through life one day at a time
So I've had my period for 3 days now and everything was normal until today. I suddenly can't stop the feeling that I need to pee constantly... It's that feeling when you have to pee so bad that it hurts but it's more in Urethra(lower down then the bladder) and when I try and go there is no pee. Is this normal? Please help!