I know for the T's in my life, when the F comes out, it's a little overwhelming. Maybe just realize that all feelings are okay, it's just what you do with them that matters (so as long as you don't go pounding doors in or drunk dialing or whatever, you are going to be okay). Also, that no matter how intense a feeling is, it will always pass. Think about children - one minute they are in the throws of pure frustration and throwing a huge tantrum, and 3 minutes later they can be joyful. Sometimes, trying to block the emotion actually makes it harder to overcome. Other than that, I think you just have to get more practice being in touch with your feelings.
My advice would be similar to what others have told you, I would say. Welcome the change in your personality and let nature take its course. Ironically, I'm going through some similar to you, except the complete opposite. I was/am a pretty high feeling person, but as of recently have been making a lot of development to my rational side. I simply got tired of taking everything super-personally. One thing I like about NTs is that they don't typically take things too personally, you guys seem to look at things very rationally and logically without getting your feelings caught into the mix most of the time. Honestly, it helps you find a lot of answers that feelers have more trouble finding. For me, the thinking has been an important skill to develop, and since I have been working on it, I have realized that I am actually a happier person, because I am not taking everything quite so personally. I just enjoy life as a journey, or even a puzzle, where I'm trying to put the pieces together. If two pieces don't fit, you don't get mad, you just keep looking for the piece that does. It helps you find the answer because your brain remains clear throughout.
Back to you. The feeling side is important too. It allows you to be more aware of how people feel, so you can treat them better. Most people appreciate when you take their feelings into account before acting; even thinking types. Being in touch with the feelings of others greatly helps your relationships with other people. It doesn't mean you have to be a "90's man, who cries when he wants to," but it's an opportunity to for you to get to know other people better, and get to know yourself better as well. Since you appear to be really thinking-oriented, and also that Fe is your least dominant function, I wouldn't worry about your feeling side taking over. The odds are definitely against it.
A hero is someone who does the right thing without expectation of reward, just because it's the right thing to do.