Don't blow what you've accomplished for the past 61 days. As you've already pointed out to us, your past relapses don't end with a couple drinks. And remember, every time you return to drinking makes it that much more difficult to stop!
When I first quit, back in Sept, all I thought about was drinking. I really didn't pinpoint the "reasons" I wanted to drink. Now that the urges are infrequent, I have more time to think about the cause. The trigger is usually an emotion I want to hid from or avoid: Discomfort, shame, rage, depression. We alcoholics have to learn to face them sober. Not escape them through drink...accept them as normal reactions to what we are going through.
Carlos, your dad is sick. It is perfectly normal to be sad about that, to be stressed as a caretaker. Accept the emotions that come and they will pass in the normal course of time. Drink and you only forestall the healing of your hurt.
Good luck to you.