Well this happens many times, and I understand your concern, since he is only a newborn.
If worse comes to worse, and he still will not take a bottle... utilize a bulb-syringe to feed him. This is what they do sometimes, with success. Even in hospitals. Baby birds are even fed this way, in order to survive.
You could also try and ask your Pediatrician.
But I know you only have 2 weeks, until you return to work... so time is of essence.
Also, have someone else feed him the bottle or via the bulb-syringe... if you are the one doing it, he'll more likely 'reject' alternative feeding methods besides breast.
For the bulb syringe... of course don't get anything "huge"... it's just one of those type of syringes that you would use for liquid medicines. And yes, feeding him this way may take time... but it's okay. MAIN thing is that baby get enough intake, daily. And so he does not get dehydrated and gets enough nutrients.
ALSO, even when using these alternative feeding tools, whether it be a bottle or syringe... ALWAYS feed your newborn ON DEMAND, 24/7. AND, tell your care provider that as well...otherwise, some baby-sitters/care providers will only feed according to a "schedule." This is NOT good... and this way he will not be getting enough intake. Bearing in mind at "growth-spurt" periods, they need MORE intake and more frequently... as they get hungrier, naturally at these times.
As for bottles, you can try again later, or here and there and see how it goes. He may get back to it.
For me, I LOVED the "MAM" brand bottles... which you can get from www.amazon.com These bottles also have no "BPA's" in the plastic. My son LOVED these bottles/nipples. And it accumulates no air bubbles in it.
All the best, hope this helps,
Susan