Hey friend: As a night-nurse, let me just say sorry for your troubles getting report. A lot of things happen right at shift-change, as you can expect. Next time, try and see if the night-nurse is still available to talk to the Physicians. As a courtesy, most of my friends and I will stay a little late to talk to MDs so that the day shift can get their things sorted -- After all, we've been here for a whole shift and know the patients well, you're just coming on and might not even have labs yet.
Next, let me also say that it gets better, you'll progress with time and confidence. When there is down-time, continually ask to start IVs, insert NGTs, put in Foleys. Get your hands dirty with some wound care too. The more experience you get, the more confident you'll become. You made it through nursing school, you graduated, you earned that license. You have it within you to be an incredible care giver, all you have to do is go for it!
Once you get into a rhythm, you'll be able to better accommodate to changes in shifts. Ask some of the other newer nurses how they made the transition, it's always very fresh in our minds. Finally, I would add that b/c you didn't get report yet, you shouldn't feel bad about not being able to talk to those doctors. Sometimes, physicians can seem intimidating and condescending, but just be confident and forthright and say, "Doctor, the previous nurse is yet to give me report for this patient, I will find them for you so they can speak with you." If you can't immediately spot them, look for one of the charge nurses, they can usually take the physicians off your back and may be able to even give the provider the info they're looking for.
Keep your head up, you're learning, you're working, you're growing in your role. Congrats at your work so far, don't be so hard on yourself! I had a little break down this weekend, so they still happen nearly a year after you start on the floor, you just have to keep on keepin on, friend.