Face mask while pregnant

I'm 16 week pregnant and I get really bad dizzy spells. I find it happens more when I'm grocerie shopping with a mask on... which I want to wear because I dont want to get sick. But I get dizzy, I slowly lose my hearing, my vision goes black and I NEED to lay or sit down. I'm afraid to go the the store now cause I dont want to fall over. I was wondering if anyone else feels this way. Or experienced something like this.