It sounds to me like you need to do something to speed up your cell turn-over and do some mild ‘re-surfacing’ on your skin to get rid of those blockages and to start stimulating your skin’s functions.
Normally I would say that you should use a range with some AHA’s (alpha hydroxyl acids) in it, but since you are sensitive, I would suggest and active range containing more PHA’s (Polyhydroxy acids), as these are more easily tolerated by the skin. I would definitely look at a range like Neostrata. If lines are bothering you, I would also include a growth factor serum in my skin care regime. Try have a look at the growth factor serums by Lamelle and Skin Medica. It would also be a very good idea for you to go and have a facial treatment at least once a month, where you can be treated with active ingredients and treatments that will boost your skin and assist you in achieving the results you need.