Dizzy spell at 21 weeks

Nicolette
I was at work today and I very quickly start to feel extremely hot I was almost sweating and my balance felt very off and I was light headed to the point I had to the countertop cause I was standing. I sat down right away and started to drink water. The the feelings went away after about 10 mins. Should I call my Dr in the morning? Or has anyone had this happen (this is my 4th baby & I have never had this issue).