33weeks and constantly dizzy

Mikayla • 20♈️ happily taken🖤 mommy of 1🤱🏻❤️💜

So I’m currently just about 33 weeks along, I get super super dizzy, lightheaded and everything goes white and then spotty(if that makes sense) I called my doctor and I didn’t get any answers, it’s that bad I can’t even do grocery shopping. He just told me to drink water, which I drink a lot of, about 6-8 26oz bottles a day. I’m concerned as to what this could be, so any help will be appreciated.