Night Sweats...
I keep forgetting about it, but my wife just reminded me for the Nth time so I thought I'd ask. I wake up almost every night covered in sweat. I tell her I am dreaming about the Energy Lab (!) but truthfully it's not right. My pillow and bottom sheet are soaked; I sleep in my boxers only, and usually sleep on my stomach, face to the side (but I wake up usually on my back). We have a king so I can move around a bit to a better spot, but it definitely strikes me as really strange. My wife, of course, sleeps like she's climbing everest with more clothes on than I'd wear outside...we are already quite the odd couple. 
Any thoughts here? Many thanks!
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I Also ditched the heavy blankets and added a fan.
Patrick, it's the same with me. I sleep with nothing on but some shorts and my wife looks like she's about to go skiing. It has gotten to the point that I sleep in another room most nights so that I can control my temperature surroundings better. Not ideal but I need sleep.
I have chronically done similar.
Of course have the basics ruled out with doc visit. Thyroid disease. Etc.
Worsening as you lose weight?
I find sometimes if I'm lacking in sleep I get them, or (sadly) if I'm coming off a bit of a bender.
When I got my diet very clean again I didn't have the problem again.
I am fascinated by how many folks have one cold and one hot partner. My wife, Debbie and I are the same. The perfect way to sleep for me would be limited to no clothes levitating above the bed, with a fan on.
Debbie would probably require 1-2 blankets, PJ's and maybe a heated blanket.
Thing is the more I train, the more heat I generate, until my HR comes down to resting (around 40) and then a light blanket is good.
Ps x2 for levitation!!
I found it happening to me with overtrained and stressed. The night after IMAZ it was like Niagra Falls.
You may not think you are Overtrained but keep an eye out.
IF I were your coach and saw an elevated resting HR for that long I'd ask that you take a rest block right away. It's a fine line you're walking and it would be a shame to see the accumulated fitness pissed away in illness or injury. Also: ever notice how we get into "accidents" much more frequently when we're overly tired/stressed?
P, back off. Chill. Literally.
Now that my soapbox comment is over, I'm also an oven at night and my wife freezes all night. I've tried the socks thing thanks to Nate's comment above and my Zeo sleep score was higher than normal for the last 2 nights (still a small sample size)... I didn't notice myself waking several times to flip or turn my hot pillow or find a new cooler spot on my bed to sleep on. Kind of makes intuitive sense to me, if your feet are cold from less circulation down there, your body heats itself way up just to bring them to a normal temperature. Who knows, maybe it was just mental for me the last couple of nights. Time will tell.
The night of sleep after a long ride I sweat a lot in bed.
One cautionary thing on the socks (which may or may not matter to most) ... if you wear socks at night, find someting breathable or you might end up with a nasty case of athlete's foot (been there, done that, not very fun).
I'm also hot natured compared to my wife who'd sleep in a parka if she had one. I tend to get more sweats at night when in a higher training phase like IM. I think it is hormonal and related to body's adaptation response. Just another small piece of puzzle/evidence pointing towards limits of body to adapt to load.