I don't know what's going on?

I have a doctors appointment tomorrow so I will definitely ask them. But at 24 weeks is it normal for:

1. My toes will start burning and then turn red (very rarely swell)

2. Twice now my labia has been red and swollen and very sensitive when wiping after peeing. Normally it's at night, I wonder if it's from sitting or standing too much.

3. In the shower for months now I will easily get dizzy and feel faint. This morning I actually had to sit down (in cold water) and have my husband finish my hair. I got to the point where I was seeing things in my vision then kept going black and my hearing kinda of went. It's never gotten that bad before. And it's in any temperature water so it's not heat.