Depo shot question

Alright so July of last year I got my first and only Depo shot and the side effects drove me crazy. I told myself I wasn't getting back on it so when I was due for it back in October I skipped the appt and haven't been on birth control since. So I haven't had a period until April of this year and then nothing after that. My boyfriend and I have only been using the pullout method is it possible that I could be pregnant? Or could my cycle still not be regulating even with that one period? (I have a gyn visit scheduled in July so I'll find out for sure then)