Glad you caught that cone. Now it's probably time for you to do a few rounds of chelating shampoo sessions, each followed by a DC of about an hour each time.
The olive oil could have created some build up on your ends too. Depending on which Jessiecurl product you're using, you could also be suffering from additional oil buildup. As if that weren't enough, your hair could be reacting to epsom salts (depending on which of her products you're using - check into that), which can dry out hair. Your hair should hopefully return to normal after your chelating/DC sessions.