2 weeks is nothing for an established ball python. Ive had males and females go off feed for over 6 months, with no problems at all. Nothing to worry about if you missed a week or two or four. Just dont make that your habit or its an unhealthy snake your asking for.

Some people just wanna jump all over you for husbandry and this and that.
"feed the thing! two whole weeks?!!!!!???!"

Lets talk about sheds though. I have never seen or heard of a ball python eating its shed.
two weeks + of a shed in a cage. I could see it deteriorating enough to turn into nothing( turn crispy and go into the bedding/substrate. Unless of course your using paper towels. Maybe it go dragged into the waterbowl and broke down that way? I can't say for certain any of that happened, I always grab sheds out of tanks as soon as I see them.

I think its very unlikely your snake ate its shed. But hey, anything is possible.