Well done! That's absolutely amazing. I managed to control my trich from when I was about 8 until recently (I'm now 17), and the stress of exams brought it back. The tips that I can give are try to have something (elastic band or plastic or something) around your wrist or in your hands. Something that you can play with. It helps to make you forget about your hair I guess. Also, having a hat on or wearing your hair up can normally help if that's the area that you struggle with.
Seriously though, well done for going this long without pulling. You should be really proud. Do not give in now! Stay strong