Well that's up to you Hun.

You can, they might not be as effective and kind of hard, but it won't hurt you

Well my grandpa just went out and spent like $15 on vitamins for me when they didn't really have the money to and we don't have the gas to go back out and exchange them so I either have to take them or not take any at all @dang_dridri

I wouldn't eat or drink anything expired.