Baths make me nauseous and dizzy

I’m 8+4 today and I always take baths, nearly every day even from before being pregnant. I love baths! Since being pregnant I take the temperature of the bath first to ensure it isn’t too hot and when I get in it’s a warm temperature and I can sit down completely right away no issues. About 10 mins in I start to feel very sick and a bit weak and dizzy, I take a bottle of cold water in too to drink and I feel horrible, to the point I’ve been quickly washing then getting out. They’re definitely not too hot and I have the fan on and windows open so there is air and it’s not steamy but it sucks! Showers are worse last time I showered I thought I was going to pass out my other half had to come help me out the shower. Anyone got any idea what’s going on or how to make it easier to wash? I don’t want to have to wash at the sink everyday :(

Also I mean like I feel on the verge of vomiting not just a little sick it feels as though it sits in my throat