Pregnancy and fainting/lightheaded

Has anyone else experienced lots (like daily) episodes of dizziness or being lightheaded and have symptoms worsen when pregnant?

I asked my OBGYN about this my first pregnancy and she just suggested drinking more water and taking B12.

This happens to me daily every morning. I start my day with B12 and drinking 1-2 full bottles of water. I have to sit a lot which is disappointing when I want to do things with my daughter but I can’t risk fainting while she’s in my care 😔

I will be asking my OBGYN at my next appointment again in June, just wanted to see if anyone else has a similar experience.