Feeling hot then cold. Symptoms going away?!

Krysta
From day 1, I've been super hot all the time to where I couldn't sleep. Had breast pain, occasional nausea, cramping, back pain, etc. I'm 7 weeks and now it's like all my symptoms are tapering off. 
I'm actually cold right now like I usually am in the house. A lot of my cramping, bloating, and back pain is going away. But I thought that could be bc of getting stretched and comfortable at yoga last night. I actually slept decently last night instead of tossing and turning which I have since the HPT came up pos. 
Anyone else's symptoms going wonky? I'm worried now about a blighted ovum. We already told our daughter and my first u/s isn't till July 12.