Bedwetting Pooch!

My 5-6 year old female AmStaff mix has recently started bedwetting. Ugh. It's not every night, but sometimes when she gets all squished up and cuddly under the blankets with me and my boyfriend she seems to be leaking. Most the times it was just a little bit. But a few times it was really quite a bit. She never pees in the house during the day when we are gone. Ever. Only lately when she's really relaxed does this occur (this happened once just a little on her dog pillow in the living room). Any thoughts on how to handle this? I spoke with a vet and he said it's probably mild incontinence which is common and recommened medicine (can't remember the name off hand). I looked this up and it seems to come with many side effects. I'd rather not use drugs. Any suggestions are greatly appreciated!! Tweet