Handicapped people requiring help

Yesterday I accepted a trip. Picked up a guy at a grocery store (first red flag) Saw him sitting in a motorized cart with about 4 bags of groceries. He had a cane with him (Second and third red flags) I should have cancelled on the spot but I didn't. Got him and his food in the car. Drove him home. Home was a second floor apartment and this man could barely walk. He asked me to take his groceries up to his apartment. I had another ride waiting. Against my better judgement because I'm a good person I picked up those heavy bags and carried them up the stairs. I'm an older person mind you. And also I have a bad back. Anyway I did it. The NEXT ride waiting was a third person medical ride (Goddamit, here's another red flag) I also decided to do it because again. I'm nice. He's a fat dirty man with a heavy filthy walker that OF COURSE, he couldn't handle to get into my trunk so I did it. Immediately felt my back give out. Today my back hurts so bad but I'll go out again.

I guess the lesson here it don't be afraid to cancel trips no matter what it does to your CR. Don't hurt yourself.