First and foremost, go into a shop and have your draw length measured so you know for certain what you are dealing with...but So what if you lose a couple of inches?
I just posted this on another thread but always worth repeating. Draw length has nothing to do with accuracy and accuracy is what archery is all about. You can always speed or penetration compensate with different limbs, arrows or bow weights.
Too many people worry about what looks good (corner of the mouth etc) and worry about getting consistency. If you want to see how shorter draw lengths can be accurate, just look at the Olympic archers, when they use the string on nose tip, for what I mean.
Proper back tension is far more important and with the right form, your DL will/should increase.