You are where I plan on being in a couple of years. I logged onto this site only one week ago, and have had lots of sound advice from people I dont know. That in its self is something very special.
Regarding the medical, my wife to be is a Doctor and tells me that they allow for nerves, high blood pressure Etc. Do some light exercise and eat and sleep well coming up to the medical, a couple of pints of Guinness will do you the world of good too!!!
Best of luck, and keep a thought for the people like me who are just out of the PPL exams and looking to go commercial.