Okay, so I am 16 years of age.
Yesterday afternoon I started feeling pain in my upper chest. Its mainly when I take a deep breath, I also get random spasms.
Yesterday, I played soccer for around 3 hours and when I got home I worked out my abs (might be some factors?).
Also , I do not smoke.

Might it be pneumonia? I've already gotten it 3 times, but its summer time here in Canada.

So, any help on what it is might be helpful..

Thanks