I did the same. Been coloring every 6-8 weeks since i was thirty ish to cover gray. Assumed i was high porosity cuz of the color and the fact that i have fine hair. Totally over proteined. Frizz fest, straw, sitck straight hair. Got all protein out of my hairs diet and moisturized the heck out of it. It recovered fairly quickly. I waited for my curls to go kinda limp and eased protein back in my " diet". I found out my hair is very picky about the type of protein i use. I stick to silk protein and npf now.
2a canopy with 2b underneath.
Fine hair, low elasticity,
Hair dislikes oil
Live in dry climate