Has anyone experienced this?

So I got my one year old down for a nap and was laying in bed and got really dizzy and it lasted for about a minute or two and felt like I was going to pass out ( was probably just because of the dizziness that it freaked me out) well now I still feel a little off think maybe it’s cause I drank coffee ? Idk. I’m 35 weeks & 4 days. I just had a doctors appointment yesterday and was fine ( blood pressure and everything but now just anxious. ) has this happened to anyone else randomly ?