I have amazon deliver my toilet paper because I'm too ashamed to let a cashier ring it up at the grocery store.
Why would you ever be ashamed to buy something like toilet paper?
I am embarrassed to buy any sort of personal care products in person.
It is fine to prefer ordering certain things online if you are uncomfortable buying them yourself in person. But it would be good to work out what about it makes you uncomfortable; maybe you should consider working on becoming more comfortable doing things that you find difficult.
I think I'm just more comfortable buying it online
Well, you really should not be embarrassed to get something like toilet paper. Everyone buys toilet paper, so you are not giving out any sort of info about yourself with the purchase. That being said, buying groceries online is a simple option as well!