HELP MOMS!!!

Tiara

My 3 year old has pissed herself 7 times in the last 2 days. She has been potty trained for over a year now and we don't know what the cause is. She gets a rash on the back of her legs and her but she has never had this problem before. I think she has a UTI I'm calling the Dr in the morning, but I won't be able to sleep thinking she is in pain. Is there any other explanation to her doing this other then a UTI? Please and thank you for your words