Where do you go for PPD help

So I'm 8 month post partum and I have just been having super mood swings lately , I get irrationally angry , then I cry. For awhile while breastfeeding for 6 months I had a lot of hormonal issues but once I stopped at 6 months it got better after 2 weeks I started my period then felt like a new person. Until now, I feel like it came back. Anyone else have this?.. Do you go to a regular doctor or your gyno. I never did go to my 6 month pp check up with the gyno maybe I should schedule that and talk to them ?..