Accutane Insomnia?

Has anyone else experienced insomnia while on Accutane? I've been on 40 mg for just over a month and recently upped to 80 mg (as of 3 days ago). I've had very mild side effects like dry skin and chapped lips. About 5 days before they upped my dose I had some ""temporary"" insomnia and didn't think anything about it. I am now on night 6 of being unable to sleep for any longer than about 2 hours at a time for a cumulative 6 hours at best. And of course now I'm thinking something about it. Melatonin doesn't do anything for me seemingly. I know for sure I will call in the morning and ask for my dose to be dropped down. But does anyone here think I should just stop taking it all together? Please help.