Extremely dizzy and nauseous! Anyone else experience this 4 dpo

Laura
4 DPO....... Could this be a sign of very early Pregnacy?
 Anyone else expirience this?
I had two very dizzy spells today.. Had to pull over  it was so bad. And feeling like throw up is just sitting in my throat after..
I did experience this with my last Pregnacy but after I knew I was pregnant.. About from 5 weeks till 20 weeks.
Here is my calendar 

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