Another sinistral here. I've never had trouble distinguishing left from right per se, but have had trouble remembering which direction you do certain things. For instance, I was well into my 20s before I could keep straight which way to turn a screw or bolt to tighten it, and which way to loosen. I've got that one down now, but other things like that can still elude me.
So my experience as a lefty has made me wonder: is left-handedness sort of a form of directional dyslexia, or is it often accompanied by or coupled with some sort of mild dyslexia. I've no trouble with spelling, reading, etc., but I know that's not all that dyslexia's about. I also have trouble with other "connecting" things: color memory, distinguishing colors (though I am partially right-green color blind, as well), relating notes on a page to notes I sing or positions on an instrument, things like that.