A.M.
This is also very normal. I am a hair-stylist and have a client with the same or similar situation. You need a good conditioner on your hair. KMS sells a deep conditioner that would be great, or AVEDA has a damage remedy treatment that would also work great. Many brands sell these deep conditioning treatments. When you use it keep it off your scalp and ONLY on the dry parts of your hair, the midshaft and ends... When you are in the shower being a comb in with you and keep combing your hair, with the shampoo in and then the conditioner, but remember keep it off your scalp.
Make sure you are using products such as KMS silksheen therapy plus or biosilk (biosilk can be greasy so be careful)(also keep these off your scalp), so something like that in your hair during the day. You can put this in after washing. It will help with frizz and will give you shine. You can then add your normal product over that.
Email me if you have anymore questions, but i hope that helps a little bit. Good luck!
:)