Itching!

Yesterday around 5:30-6:00 I noticed that my vagina has been itchy! It's itchy where the inside of lips are and where the hole is at. I've never had an STD of any kind. I only have had an UTI. My first UTI was when I was pregnant with my son ;(doctor assured me that UTI's are common in pregnancies) and then I had another UTI about 3 months ago. What can make it so itchy? And also it doesn't burn or hurt when I pee either, it's just itchy. It's so annoying!! Anything will help! TIA