What do you think???

i got on the depo shot after having my son, it's been 2 yrs since my last shot.naturally i didn't have my period for about a yr to a yr and a half. when i finally did get it it was normal for 2 months then i skipped a month then it was normal again then i skipped 2 months. It keeps changing and now yet again i haven't had it in about 2 months...even before i had my son it was irregular, and it took me about a yr to get pregnant. To me it kind of sounds like i have Polycystic ovary syndrome but I'm not sure. I'm going to the doc. to get checked but what do u guys think????