I know how I feel usually -- enough to describe it in words -- but sometimes I need time to process and figure out exactly why I'm feeling that particular way. Not a lot of time, maybe a few minutes at most, but sometimes I need to set that time aside to actively do it.
I need to reflect when there is a mix of emotions, or something unexpected happens so feeling, at first, doesn't seem to match circumstance until I put it all together.
I sometimes sort it out by imagining talking to a character I created. I imagine tell them how I'm feeling and they sum up why in response (they are helpful that way, lol). I'm not crazy, it keeps me quite sane . I started doing this when I was a kid. I suppose that may be how the duality works with my Gem moon -- twin within.