Killed some insects, felt guilty?

I don't think you should worry about it. It was obviously an accident, so you shouldn't feel guilty. a lot of people (like me) kill bugs on purpose if they are on their house, or near them. and i don't feel guilty about it. But that's personal preference. So what you are doing is nothing compared to what other people do to bugs. Just tell yourself "it was just an accident, i didn't mean to kill the bugs."