Dizziness after standing for like 5 minutes?

Hello all, to start, I will be 13 weeks tomorrow. In the first few weeks, I’d have dizzy spells here and there when standing up too fast or something, then it kinda calmed down. It started happening again a few days ago. I get so dizzy to the point I feel like I’m going to pass out. It’s like my sugar and blood pressure just both drop at the same time and I’m getting nervous. It’s happening a lot too, any time I’m standing for longer than a few minutes. Has anyone else had this? Should I be worried?? This is baby #2 and I developed pre-e with baby #1 at 31ish weeks.