Need help. Think snake is sick

[Juggalette]

I jst got my python and he's been perfectly fine. Normal. He started to look like he was gunna shed, his eyes got grey, he stopped eating and his skin got wrinkley. But now he's crawling around real slow, trying to flip his head upside down, and it's been 2 weeks since his eyes went grey like tht. I thought he wud have shed by now. Someone plz help. Shud I take him to the vet or will it pass?