Can I take left over Isotretinoin/Roaccutane pills to counteract a 2 month flare up on my chin?

I've had another flare up of cystic acne on my chin for 2 months now. I took a 3 month course of Isotretinoin (Roacutune) back in 2014 and I have a whole box of the medication left over. Would it be safe to start taking a short course again to counter act the flare up? It's so mild compared to the time before BUT this isn't going away on it's own! I'm living abroad temporarily and unsure of dermatologists here, plus I don't have the money for a consult. Would I be okay to take a small course?