Sudden bump on the side of my foot, painful

Members do not see these Ads. Sign Up.

Hi
On friday night I felt a dull pain in my left foot, thought nothing of it as I've sometimes got little aches and pains that go away when walking. but satarday morning the place the pain was coming from is swollen and warm/hotish to the touch. its just past my heal, on the outser edge of my foot on the inside fleshy part. the pain does raidiat towards the middle of my foot too. I thought it was a blister, but its not, and I cant find anything in it and the skin isnt broken that I can see.
It is slightly red this morning in places, sunday, and throbbs a bit, very painfull to walk on. but I wasnt doing anything at the time when it first started.
I'm sure its not celulites, as I've had that before and I dont feel unwell.
I guess I'm just looking to see if this is anything enyone else has experianced, as I'm not sure if this is an emergency or I should just wait and try and see my own GP tomorrow.
Sarah