Now that you mention it.....
I don't think this type of thing is that uncommon, at least I don't think it is. I often find myself battling two minds. The other one is my "shadow self', the negative side that complains, thinks it can't, gets impatient, holds grudges, etc.... Sometimes it appears to win....for a day. And if it's blocking me getting something done, or getting past a problem, my higher self writes out notes in magic marker and posts them on the mirrors around the house. Back on course again in no time, often with laughter.
I don't remember being this way that much when I was younger, so perhaps it's a learned behaviour....being cognizant of our emotions and how they color our world day-to-day.