I have been CG for 3-4 months now, and I was wondering. How can you tell if you have too much/not enough protein? Thanks!

3a/b thick, curly hair, SL
CG method since August, 2012

CO wash: Garnier Fructis Pure Clean Conditioner (with brown sugar when needed)

rinse out CO:
TRESemme Naturals Radiant Volume Conditioner
leave-in: TRESemme Naturals Nourishing Moisture Conditioner

stylers: jojoba oil, LA looks sport gel (winter), ic fantasia hair polisher styling gel (summer)