With OCD, guilt invades random and benign situations. OCD deceives the sufferer into feeling an impending sense of something being wrong, or that there is a threat or risk (when there is none), and that the only recourse to the feeling is to thoroughly check the alleged source of threat, pray for safety, perform magical/superstitious rituals, or make any other effort until that “right feeling” is achieved and that all possible measures were taken to prevent the potential harm.
The most common challenge to alleviating obsessive guilt involves being willing to let go of the fear of negative judgment by others and trusting your one’s own judgment and intuition for making decisions. All else flows from that self-trust. If someone in the same situation wouldn’t think twice about it, neither should you! No double standards!!