Skin infection or Eczema on stomach ?

First time I noticed was about couple months ago and it was tiny spot near my belly button, then it started spreading for past few months. It doesn't feel itchy, but i know it gets crusty once in awhile. I originally thought it was fungal infection so I have tried OTC anti fungal creams however none helped. When i saw a doctor, she said hydrocortisone will remove it, but it did not. I am very concerned because i don't want it to spread all over my body and who knows what it will cause? If anybody can give me an insight i would appreciate it. also don't mind those pajama marks ...

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Some symptoms and signs of infected eczema include: inflamed skin (swollen, hot, red) blistered skin, ‘boils’ and cysts. pus/weepy fluid (often yellow or green) coming out of the skin and crusts or scabs