Really embarrassing situation. TMI!!!!

Entered my 2nd trimester with twins a few weeks ago and on top of persistent morning sickness, I now think I'm peeing myself wet. I say 'think' because I don't really feel myself peeing, but my undies get damp and I have to put clean ones on regularly - the strong pee smell is too much. My hubbie has smelled it on me and continues to joke about it. I'm terribly embarrassed. I've heard of incontinence, but can it happen at 15 weeks?! Any remedies/advice? I already wear liners, but it only helps for a little while.