How long does it take gyno to develop and be permanent?

[povertyhairline]

I started getting pain in my chest and burning sensations about 3 days ago. I'm pretty sure this is the beginning stages of gyno. I made an appointment with my doctor but it's in 17 days. Is this enough time for gyno to set in?

 

[smyth01]

Can take years! Majority of men suffer from breast pain now and again, weeks at a time.