Idk what’s wrong with me 😫

So yesterday at work I almost passed out. Like vision going in and out, lightheaded and starting to become unresponsive. I had people come bring me plenty of water and I ate crackers. I’m 12w5d and mind you never really had BAD morning sickness. So I started feeling better and I had to leave work to go the the emergency room. After being there for 6 HOURS! They tested my blood, urine everything and it was all clear but it says my white blood cell count was high probably because I threw up the water and stuff or either I have an infection somewhere. So he told me to follow up with my doctor which I’m currently switching. But I get to work again today and I’m starting to feel the same. I haven’t been eating much so irdk if that’s the problem. What could be wrong? They wouldn’t even Check to see if the baby was ok and am so worried