Go out with your instructor and practice until confident. Don't rush to lower flaps. Learn how to sideslip, in case you find yourself high when on final.
If you have been taught a constant aspect PFL, tell the examiner before hand, although he/she probably won't mind which technique you use, as long as you maintain a correct glidespeed and look likely to make a survivable arrival in a field. Don't be surprised if the examiner leaves it very late before telling you to go around, and treat that go around as carefully as any other.
Best of luck.