Could I have received SS for taking care of my dad?

Not likely. You can check with your Social Services office and see what they day.
Good luck. Many people need financial help for this but it's hard to come by in most states.
Carol

This may not be from SS, but in Ma you can receive $1200 a month if your elderly parent lives with you, and you don't work because you are his/her full time caretaker. The visiting nurse or hospice worker might be able to get you more info on assistance for caretakers of an ill elderly parent.