Is this just a callus or something worse?

[MsHopey]

Kind of gross, but I've never had cracked heels or anything similar.
I was in the hospital 4 weeks ago having my son, so I'm a little bit worried I've caught some kind of foot/skin infection, or if its just a bit of cracked and hard skin.
It's a bit painful and theres some bleeding.
I cant say I look at my feet particularly regularly and only noticed it this morning because of the pain.
Have I caught some nasty skin infection? Or is it just a callus?
I did have gestational diabetes which worries me incase its escalated into type 2 diabetes which is causing the foot issues.
Any ideas anyone?

I'd go see at least the practice nurse, just to check on it at least.

go call your gp.
ask if you can self refer to a podiatrist.