I feel your pain, I bought my Macbook about 2 weeks before they upgraded because I didn't know any better, and I didn't think to check because I was desperate for a laptop (I had sold my old one already). Now I keep my eye on this link...
https://buyersguide.macrumors.com//#MacBook_Pro
But like some others have said, I am sure your machine is still fantasic! I am still using my black Macbook of 3 years ago. Although I am tempted to buy now, this one still works PERFECT. I am trying to hold out until just before I graduate next year (so I can still get the student discount). There could be another 2 updates by then.