If you are self aware enough to feel that way, then it is unlikely you are an unreasonable person. Emotions can always cloud our judgement at times, nobody is perfect and we all have our moments when we allow our emotions to override our logic. Making mistakes and being emotional isn't the problem. It's being brave enough to look at the situation after we've calmed down, and if we made a mistake to admit it then try to learn from it. Sticking to an opinion you know is wrong deep down because of pride makes you look a lot worse than being mistaken yet strong enough to admit it and grow personally from it.