Trich is one of the most frustrating compulsive behaviours I think. I have been pulling my hair and picking my split ends apart for... Oh I guess almost 10 years now. I have a myriad of other obsessive compulsive behaviours, but the worst are the trich and the food obsession... I think it is how I cope with my PTSD, though I know it only makes it worse. I was blown away when I realized it had a name and that I'm not the only person that does it.
So if all you're doing is pulling your eyelashes/eyebrows be happy that's all you have to deal with and if you think it's progressing to something more serious, get help for it if you can. I'm 26 now and wish every day that I'd gotten help when this started.