A basic rule is saddle too high = pain in back of knee
too low and/or too big a gear = pain in front of knee

but you don't have pain right? just a funny feeling? Everyone here is right to encourage you to let someone in the know check your position. After that, you may just need to give it some rest before it does begin to hurt.

And your saddle/bar drop is not much at all, unless you have very poor flexability.