Couple things. Did you take a hydrometer reading? You need to do this to ensure that your beer has reached final gravity. If your beer continued to ferment in the bottle you could have gushers. Sounds like an infection but 2 weeks for an infection to show up is fast, unless you did not sanitize your bottles at all then it is not as likely as fermentation not being done.
Case in point- I've bottled beer off my kegs into unsanitized bottles- these were merely rinsed in hot water and then chilled and filled. They lasted 2-3 weeks in the fridge with no signs of any infection at all, no gushers etc.
Kegged: Millenium Galaxy IPA, German Pilsner. Apricot Blonde Ale, ACE Witbier, ACE American Wheat.
Bottled: Smoked Red Rye, Old Tanglefoot Barleywine, Tripel, Dubbel, American Farmhouse Ale