Were you traveling alone with two young children despite a history of air sickness?
What was the purpose of your trip?
If you had experienced travel sickness even once before you should have taken travel sickness pills before your flight. You put yourself, your children, the crew and the other passengers through a lot of needless misery and you potentially exposed all of those people to viral or bacterial illness.
YABU to have traveled at all though, in the present circumstances, unless you had a massively compelling reason to do so. Did you honestly expect that a steward would hold your baby while you went to the loo, given that you were vomiting and possibly had a vomiting bug, or Covid?
Given that you did travel, you should have taken air sickness tablets to reduce the likelihood of vomiting.
Are you scared of people who don't wear masks?
Yes I am. Because if they are so insanely inconsiderate of others that they would risk a fine (I live in a sensible place where masks are mandatory) then what else have they been doing that is likely to have exposed them to covid-19.
Someone I know died of Covid earlier this summer after over a month on a ventilator. He left a wife and two young teens. My sister got the virus in the spring, just before the country she lives in locked down. She is still suffering its after effects and it is likely her life will never be the same again. Her lungs are damaged and cannot be repaired. What her old age will be like remains to be seen.
I am actually feeling quite angered by your inability to see past your own very petty concerns here.
You wear a mask to protect others.