I can't believe that anyone would even contemplate leaving a 9 week old kitten alone for two days.

If you really don't have much choice find a reputable pet sitter in your area that can visit the kitten a few times a day but personally I don't think you should have a kitten in the first place if you have to leave it for two days, but that's just my opinion.

If you want this kitten to have a happy, healthy life I think you need to reassess your priorities.