Sudden Dizziness/nausea

I am 17 weeks today and have been experiencing some of the worst dizzy spells that seem to come out of no where and last forever. I will be doing a mundane activity (like washing dishes) and suddenly feel like I’m going to collapse my dizziness is then followed by extreme nausea. Luckily I have not fainted yet but I have fainted many times pre pregnancy and the dizziness, nausea, and headache are all bringing back bad memories. When this happens I typically just lay down and wait until I feel better but it has been happening frequently and was wondering if any of you may have some tips for me. Also, I know that dizziness is a common pregnancy symptom however it is so severe that it takes me about and hour to start to feel better. 🙁