I'm anemic as well. That might be the reason. I'm taking iron supplements. Make sure you're eating enough and drinking PLENTY of water. Also make sure when you take showers or baths that the water and room doesn't get too hot.
Is the shower too hot? Is your sugar low? I think you got up too quickly same thing happened to me but I landed on my mom
I had fainting spells in the shower every time with my first two. I was anemic too. the doctor had me taking iron supplements twice a day and that stopped it.
Also, i am anemic. All i drink now is powerade.
I would call your doctor , and make sure you are eating and drinking enough.