Hm, there could be hormonal changes influencing your curl pattern.

Deva products have proteins in them, so my first guess isn't that you're overconditioned.

I'm very curious though: what kind of damage do you think you have? You mention chemical: do you color your hair? When you mention heat damage from the stove/other kitchen appliance, do you spend a lot of time in the kitchen? I've never really considered heat damage from anything other than hair appliances, but I imagine it could be possible...
|| 3b; normal porosity; fine/normal texture || CG since Feb 2010 || SD prone & Propylene Glycol Sensitive

Current Routine BAQ henna 1/month Leave-in OH Hair Dew Cheapie Conditioner Tresemme Naturals Moisturizing
Old Stand-bys extra-virgin coconut oil Protein AO GPB; Moisture AO HR Style AOMMJ Kept for troubleshooting.
Waiting to try extra-wide curlformers SD treatment Neutrogena T-Sal; H&S Clinical Strength