For the time being, until you work out the best position for yourself, you could simply flip the stem (turn it upside down) That would bring you down lower if that's what you are after. Please post a pic of your stem bar area so we can see the set up now. There are variations to stems, so without seeing yours, I can't give a definite answer.

edit...I just searched the trek 7100 and it appears you don't have a threadless headset. That alone is going to limit your options as your forks have been cut flush with the head tube, thus restricting bolting multiple stems on it. If your stem is the type in this picture http://www.trekbikes.com/us/en/bikes...n/hybrid/7100# I have no idea, sorry.