Thrush??

Ladies I was just wondering what exactly thrush is or what the symptoms are off it. I'm 37 weeks pregnant and have been very itchy down below from last night only. I feel quite dry down there if that makes sense😑 like there's no discharge.. I've never had thrush before so I'm curious to why I could be itching. I haven't been having sex with my partner as much due to not being able to move as much lol but we did have sex Wednesday night, could that have gave me thrush?