Help!

What should I do has anyone heard of this? I been passing out since 10 weeks pregnant and it getting worse.. it starts off I’m dizzy/lightheaded then I start to see spots and my hearing goes away then boom I’m face first to the ground... I’m now 27 weeks and it’s happening a lot I don’t even have to be in the heat or standing to feel this way, please don’t say dehydration because I drink plenty of water I tell all of my nurses this but because I don’t ever see a doctor and I don’t see the same nurse every time they all say “drink water eat protein” you are fine... my blood sugar and blood pressure are always low but because “I’m small” they don’t take it seriously I think I need a new doctor office, I’m just wondering if anyone has the same symptoms...