Also, 2k tp is literally nothing. That is 1/13th of one daily quest after lvl 50 or so. So the fact that you wasted 1/130th of the tp you will soon be getting every day you do dailies is no big deal at all. Especially when you take into account the fact that at endgame levels, it costs over a million tp to level ONE skill ONE level. In conclusion, don't sweat it.