L.M.
I'm a former hair stylist and I would reccommend using a good quality deep conditioner once or twice a week in addition to a good quality shampoo and conditioner until your hair starts feeling better. You can switch brands all you want and unfortunately, depending on the hair's damage there is not really a whole lot you can do to bring it back to life (if it's too far gone) and you might just need a good trim. There is a wonderful deep conditioner by Kerastase. You'd probably have to purchase it in a salon or online though. Be careful not to use flat iron, curling iron, hot rollers, ect. right now too- that could be one reason your hair is feeling dry. Hope that helps! :)