Heel pain

I been having an issue with my foot since I basically had my son 2 months ago. I’m going to try to explain this so it makes sense.

When I first start walking in the morning it doesn’t hurt. However if I’m up walking around then I sit down for any period of time my heel starts hurting when I put weight on it. Basically when I get back up it’s really painful. I had an epidural so I’m not sure if that has to do with it but it’s my right heel. When I was pregnant and after my feet were swollen pretty bad. I had to take water pills for the swelling to go down per my OB. I know I need to see my doctor about it but I’m just wondering if anyone else has experienced this before I’m not sure it’s related to child birth. I’m just using that as my timeline and a little back story. I know nobody hear can diagnose me but if you have any idea what is causing this pain please let me know, thank you