I'm pg with dc3. My beloved old pg jeans from previous PGshave disintegrated. I bought them in the us and can't get them now. Have tried so many types this time round, but none are comfortable. None stays up, or fits properly round my bum. Am a slim build, but not scrawny. I'd just like something that sits snugly on my bum, but where the crotch doesn't end up mid thigh after 5 mins. Not too fussed about style. I'd also prefer not to pay mega bucks as this is definitely my last pg! Please help!