I have been having dizzy spells lately. I was just sitting here cutting paper and all of a sudden I…

I have been having dizzy spells lately. I was just sitting here cutting paper and all of a sudden I got really dizzy and felt like I was gonna pass out. I'm 33weeks 5days anyone know what it could be?? is it normal? They have been quite frequent lately to the point I feel like I have to throw up cause I'm so dizzy.