confused

Mu
So I'm only on the 3rd day of my fertile window...the past 2 days I've been so nausious been sick a few times (very unlike me I'm never sick), feeling dizzy, tired and emotional. 
Today I sneezed and had to run to the toilet it felt like AF came but it was just clear/milky CM but ALOT of it and I've had it all day since. 
I feel bloated a lot and something just feels different. 
Anyone experienced this?