Fe-dom (recent convert, ha). This can happen, but I have trained myself to manage/deal with it. In some situations, I can choose to feel or not to feel. I REALLY don't like getting slammed with feelings over what I permit. But, it happens, and it drives me crazy when it does. I don't want that. It is unneeded and it only succeeds in getting in the way of things. If something triggers my feelings, omfg I feel it, a lot. My emotions are powerful and debilitating when they strike me. I can control the outward expression of it nearly all the time, but it still effects me. At worst, it can render me unable to get out of bed.
I very often feel the nagging urge to "talk to someone, aahhhhh I need to vent!" but I seldom ever do. I don't like doing it. It makes me feel like a terrible shitty person for dumping my unwarrented problems on someone else, who ultimately has to suffer hearing them, and any advice or support they offer usually ends in me shooting it down for a variety of reasons. As much as it hurts, I keep it to myself so it minimizes the effect on others; it's the fairest thing for me to do. The only time I do it is if I completely cave to the pressure, and even then I restrain it. In hindsight though, I find myself making small slips in this regard quite often. My need to talk to people about my experiences (the need to share) is rather high, and I do it without thinking usually.
Ultimately, I am really fucking moody. I hate hate hate haaaaaaaate this about myself... but it is what it is. I have an emotional reaction to almost all unexpected or important events.