Hot and nauseous..3dpo

Jo • TTC baby #2 :)
Hi all
It's just one day out of my fertile window and I feel like crap! What is going on? I'm hot, achey, crampy, lethargic, bit of an upset tum, and feel sicky. Have eaten but not been sick, is it too early to possibly have something going on? The 14th was our 33% day and bd'ed twice. 
​Any comments appreciated. I could just be crazy!