Can walking pneumonia turn into pneumonia?

I have walking pneumonia, so I stayed home a week, and it seemed like it was getting better. But I went back to school today and now I feel a thousand times worse and have a deep cough (kinda sounds like a smokers cough, it's that deep and painful sounding, but I don't smoke and I don't live with smokers) and I'm all achy and feverish along with a swollen throat/neck. Is it possible that my walking pneumonia turned into regular pneumonia, even though I'm taking my antibiotics?