I was having a nice day to myself I was doing my face I was in the shower attempting to shave and…

I was having a nice day to myself I was doing my face I was in the shower attempting to shave and such (just a note i take cool showers) and out of nowhere I lost my breath. My vision got dark patches and I felt like I was gonna pass out right there I had to get out water still running soap all over me and sit on the floor of my bathroom until I like regained consciousness. It was super scary and I have felt dizzy showering before but never this bad! Anyone else have anything like this happen to them? I couldn't even catch my breath to yell my mans name it was the scariest thing I've ever had happen.