Aw, the poor thing! Going by the size it was a queen, looking for a place for her nest. You killed a whole population of bumble bees in their beginning! And bumble bees don't sting unless they absolutely have to, they aren't agressive like wasps. But okay, let's put it down to a bad day. LOL. Just out of curiosity: is it really necessary to still feed the birds? We stop feeding as soon as the snow is gone and it gets a tiny bit warmer.

Anyway, hope your days will improve and won't have so many unexpected things to deal with. It's good to hear that spring has finally arrived at your place, too.