Is this bud rot

I'm at about 6 1/2 weeks into flowering. Most of the main fan leaves have yellowed and fallen off. Now today I notice the tips of the small leaves in the bud starting to loose color and curl. Images attached. Is this bud rot or just another stage of flowering?

I don't have a humidity tester but I live in Colorado and it's very dry here and these are indoor buds.

If it's bud rot what can I do.

Absolutely not, your leaves will loose color and die off towards the end of flowering, bud rot look like moldly, miscolored bud

thats nasty!