How Long After Stopping Pill?

Ashley
My husband and I recently discussed trying for our first baby! I have been on the pill for years, and recently my DR. had me start taking it constantly-no placebo pills in between- to help with my migraines (been doing so for 3 months now, not due for a 'period' till next month). 
How long should I go off the pill before trying? Anyone else have this experience? I'm new to all of this!