Thick, soft and stretchy, but just too large

I bought the Size Regular: 5' 2" - 5' 8", as I am 5'4" and currently at about 160 lbs in my third trimester. I liked the over-the-belly fit. The fabric is thick, soft and stretchy, but this size is just too big on me. It's saggy in the ankles and crotch area, so I have to keep surreptitiously adjusting it. Unfortunately I bought the three-pack, so even though I've only worn a single pair of tights, I don't think I can return the other pairs for any sort of refund, even though they're unfortunately unwearable for me.

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