S.T.
I had my first naturally - my second child was way too big and I had an emergency c-section. Keep in mind you are recovering from abdominal surgery.
I did not feel 99% for many, many months. My son will be 15 this Summer and my scar still itches and there's a spot lower than my incision that still feels numb. But everything else is back to normal.
There are didfferent kinds of pain - and I'm not sure what you're in pain about - is it about the incision? Is it more internal - like your muscles and organs?
I think it's not uncommon to still feel some discomfort around the incision - nerves are cut and as they grow back and restore the "super highways" of your nervous system you may feel discomfort as they begin to "fire up". But if it's a deeper pain, uterine, muscular, abdominal - then talk to your doctor. You have a baby now and you have to stay healthy!
As for your period - I was 40 when my son was born. I nursed him as well and I didn't get my period for 2 years! The doctor thought I might be perimenopausal - but I wasn't and it came back for another 13+ years.
Our bodies are pretty complex - it's only been 6 months - give yourself from time. Things will become "normal" one day. the question is - What's normal?