So much sweat!

Whenever I get to sleep more than an hour or so, I wake up drenched is sweat! Almost completely sweating through my shirt and shorts. I'm 15 days pp, and it's been happening since about 6 or 7 days pp. Anyone else experiencing this? I never was really swollen while pregnant and have already lost over half the weight I gained, too. And I'm also drooling a ton when I sleep, too!