You talk about astigmatism as though it was a sore or a pimple....lol...your mother doesn't have one...she has astigmatism , period.
8 out of 10 people have some astigmatism...it is normal , and isn't a big deal.
A small amount of astigmatism can be found in most people who don't even have enough to need glasses.
The only way you will know is to wait for the exam results . You can't tell on your own.
The drops used for dilating sometimes sting a little bit, but again , it's no big deal. The pain is the period after the exam when you can't see anything up close because of the drops. Not physical pain...just annoying.