Accutane causing eczema all over my body! Please help.

I was prescribed Accutane 20mg for 2wks then increased to 40mg for a month and then 60mg. My skin began to get extremely itchy and I see dry red patches mostly below my butt and my legs. Hydrocortisone n lotion only help for 1-2hours before they itch again. Told my derm and she put me back on 40mg. Now (4mths in), the dry patches still itch n still there, and I'm also suffering from vaginal dryness. Should I stop Accutane?? If not, will all of these go away after I'm done with Accutane??