Vaginal itching

I am 22wks and during my first trimester for like 2 wks I had severe itching down stairs if you know what I mean and I couldnt even sit down without doing a little butt wiggle I was soooo uncomfortable! I bought vagisil and it worked amazing. I am now 22wks and I started getting the severe itching again and vagisil only helps for a short time. Is this even normal?! Does anyone else have this issue& if so what did you do to help?!