Birth control

I've was on depo for 6 months of 2013 then switched to the pill till July 2014 . Is that enough time off of bc too conceive I also have longer cycle days like I'm on cycle day 29 with out a period. And I bet it'll last longer.  Can having a long time between the first day of your period and the next hurt your chances of getting pregnant. 
Any helpful tips and comments are greatly appreciated .