Pnuemonia recovering w/o treatment.?

I was very I'll the past 4-5 days. I took off work for 3 of them and I rarely take one off for anything. I stayed in, slept and drank OJ the entire time. I developed chills fever and my entire body ached like I ran a triatholon. Even my testicles ached the same way it was so bad(Too much info?). The aching and fever wasn't acommpanied by the phlegm, but I had so many cough suppressants in me, I may not have been coughing enough to notice at the time. Although I did cough a lot regardless. The phlegm that came was once during the extreme sickness and it was very small and brown. The phlegm that came during the slightly less sickness was abundant and lighter green with very light red swirls. I coughed that up about 3-4 times. I'm still pretty sick now but feeling much better. The phlegm still exists but it's only the size of a quarter. After all this I talked to a few friends and they screamed at how stupid I was for going through that w/o seeing a doctor. They told me I had pnuemonia. My questions are: did I actually have pnuemonia, or something similar, that you don't need antibiotics for? I'm still a bit sickly( chest and head hurts and still a but weak) can I go back to work w/o risk of being contagious. Should I still go see a doctor even if I feel I'm recovering? Thanks!