Not sure what this is

Dani • Laid back and chilled little blondie
Hey all, so basically my v is itchy, irritated and red and I used a thrush treatment as that's what I thought it was from. I had thrush a couple of months ago and it felt similar. And for a few days everything was normal except just tonight it's gotten itchy again. It feels like it's itchy in one spot like a bite but then it changes. I had sex about 3 weeks ago with a condom and my partner is clean. Help please! I need suggestions as to what it could be! And also if I scratch too much it burns and bleeds a little bit but it's almost as if it's burst blood vessels on top of the skin not an actual scratch and it's not coming out of my v. My period is also now late by 3 days. Help!