What can I do to control my sweating problem while pregnant?

I've never had problems with sweat before. It could be 90 degrees out and I'd never have to worry about embarring sweat stains under my arms, but the past few months have been a NIGHTMARE. I'm almost 39 weeks pregnant. I can't seem to keep the sweating under control. It's just the perspiration, I don't smell bad lol I've tried 4 different deodorants but nothing works! I can't wear anything anymore without having puddles under the arms, it's so embarring. And the crazy part is, I'll just be sitting, literally JUST SITTING on my couch and within an hour I'll have sweated so much under my arms it looks like I JUST RAN A MARATHON! Has any other women had this problem while pregnant, if so what was your solution if any? Will I be back to normal after the pregnancy?