Good call - I think it would be like foreboding except with a feeling respect to something that has happened rather than something that will. "postboding" isn'

Good call - I think it would be like foreboding except with a feeling respect to something that has happened rather than something that will. "postboding" isn't a word but I think that might capture the feeling. Like in my example of sending an email, feeling uneasy and then the sudden realization that you forgot to attach something - so you fix it and the feeling is changes to relief.