Help

So for the past 2 years since I have given birth to my daughter I’ve had extreme amount of discharge and it smells also my periods are really irregular to the point I’ll have a period then miss it for 4-5 months then have one again this miss it for months also I don’t know if it’s linked at all but my belly button for the past 2 years has been producing puss if I squeeze down on my belly button puss comes out it’s also red and sometimes itchy I need some advice 😖