TTC with irregular periods.

hi ladies, i'm hoping maybe some of you could give me some advice. my fiancé and i decided to start a family four months ago, but at the time i was on nexplanon (which i have had removed on 09/05/2017). now that i'm off of it i know we will be able to actually try for a baby, but i also know it will be difficult with my periods being as irregular as they are. anyway, i was wondering if there's any advice or words of wisdom anyone could lend me? when i saw my ob-gyn to get my implant removed he assured me that it is possible to ovulate without having a period, though it's harder to keep track of. anything helps, really. thanks to anyone in advance & good luck to all you hopeful mommas out there! ☺️