Either one! You can also reach out to to a psychologist / psychiatrist directly but going through your ob or pcp can get you a referral or two
My OB always told me to tell her if I was experiencing anything like this. I would make a call before making an appointment and see what your ob thinks
I talked to my Dr regarding it as my ob basically dropped me after I had my baby all because I didn't have a c section so had to get a Dr and it's been great