Could I be pregnant or am I late because of bc?

Latricia

I got 1 depo shot in Nov 2016. (The only shot i had) Had my first period June 7th. I should have been due for AF July 5th, but so far nothing. Hubby and I are TTC but I'm concerned my cycle isn't quite normal yet. Has anyone had irregular periods after depo and how long did it take to regulate? Also, dr found cyst on right ovary. Could that be causing a problem too? Not having any symptoms of pregnancy except heartburn which I get on occasion.