Early pregnancy and dizzy?

I’m not sure how far along I am, since I don’t have my appointment until the end of this month. But the past few days I have been SO dizzy and lightheaded. Today at work I was walking and got incredibly dizzy and saw stars and felt like passing out. I’ve been drinking a bunch of water and eating healthy and enough. Should I be worried? Is this normal? Or should I go to urgent care or something