everything you eventually figure out as it wasn't what you needed to do is a way to be deeply in touch with your intuition. so remorse makes you see there was something you were not seeing, but now you can. it can be just a reminder of who you are.
you can be angry and try to blame others as a reaction to that, but when you see it, when you feel the anger - that maybe was there before you made that choice but you didn't allow yourself to feel - and you face the remorse, you can look at the things you were not seeing before and let the remorse go, cause it's no longer needed and you'll be closest to you.
if you want to, try to see, in a situation that you felt remorse, if there's something you were trying not to feel. and then just let the feeling appear and open up to just feel it.
please tell me if something bothers you here.
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about being stupid: maybe you're trying to be smart. I see myself in this position a lot - writing this comment is being a struggle because of that. but that's an ego search. that's ok not to know something and to make mistakes on things you clearly know how to handle. but that feeling of being stupid maybe shows us that life's wisdom is available for us, we can just open our eyes to that.