Keep this in mind - you are fresh out of school. You're equipped with fresh knowledge, and may find yourself knowing a lot more than you think. There is the initial aura that because nurse's will have been on the floor longer than you, they will know everything infinitely more than you. Not true, sometimes nurses will come to you with questions
What you don't have is the intuition. Don't fret, that takes time and experience. Follow the lead of others, and ASK QUESTIONS! If you don't know, you aren't inferior - you can't know everything all the time. Its okay to ask a question. Its not okay to assume or "wing it" and put the patient at risk.
Coming out of school, take a break. Take care of yourself and what fun you had before nursing school. Once you're refreshed, come back to education. I have a wall of nursing books that I read and re-read to maintain my skill set and understanding. Go after all of the certifications and classes that the hospital offers. Even if you don't use it on Med-Surg, just get it for the sake of knowing. I can't tell you how invaluable TNCC was for me, it really helped to hone my approach and assessment skills, and gave me confidence in crisis situations (even when trauma is not involved).
Good luck! Its hard work on Med-Surg, but it is very rewarding