I also did two courses of treatment of Accutane -- nine years apart! The first when I was 36, the second when I was 45. Both times made my skin EXTREMELY dry while on it, but i returned to oily skin post-treatment, just not as oily. Today, at age 48, my skin is still slightly oily (score of 27 in summer, 25 in winter), and very sensitive (S-42), so still breaks out ocaissionally. I don't get cysts at all, or breakouts mid-cycle. The eruptions I do get are small, shallow, and clear in a day or two.
While on Accutane my Doc repeated told me to treat the dryness in any way that made me comfortable. He repaeated (like a mantra) that nothing I did topically would affect my skin as much as the Accutane was. The extreme dryness leads to flakiness, and can even lead to fissures, if left untreated, making your skin vulnerable to infection.
For now, treat the dryness. Worry about tommorrow, tommorrow.
I, too, am glad I went on Accutane. I consider it a drug of last resort, and would never recommend it to someone who has not yet exhausted every other option, but that is exactly what I had done. I went on it after 20 years on Retin-A and Tetracycline. Accutane eliminated the need for daily drugs to control my acne.
This is an uncomfortable time for you -- but, hang in there: when it is over, you'll be glad you did this for yourself.