period/fertility after depo

Hey ladies,  
I've only had one depo shot which I was supposed to go back in July to get another one for but never did since me and my fiancé have decided we want to try for a baby. I've had many periods that have lasted for a long time and have been irregular but recently I have one that was I would say about 28 days from my last one and it lasted 5 days like my periods before depo would...i feel like my body is getting back on track. Does this mean I have more of a chance getting pregnant?! I still have my fertile days also. I also took the pill "Vitex" for a little while which is proven to help fertility also.