history: One day I was a bit short on cash so I didn't give a homeless man any money. I felt really bad, as I always try to give something to those that are in need.
current: There was a day that I was a bit short on cash on hand and I didn't give money to a homeless man. I usually always do, as I feel it's my part to help those in need, as I am blessed. I felt very bad that I didn't that day.
next: I don't think you should feel too bad about missing one day!  It sounds like you're generous regularly.  I get it though.