I was diagnosed with pneumonia on saturday. & now i'm short of breath and wheezing. should i go to the er?

Probably: If you have a primary care physician and it is during office hours, you can call them for guidance; however, this sounds like a major change in symptoms that warrants evaluation. Pneumonia can become worse fairly rapidly and can be life-threatening if untreated or treated ineffectively.

Yes: Shortness of breath is always a serious symptom and requires medical evaluation, .