I think that again my main concern is making sure that you understand calculus and will be ready to use it when you need to.
Do you know whether you are having trouble with the concepts, or with remembering all the formulae, or applying the formulae to solve problems, or something else?
If you truly understand calculus, you should be able to re-derive the formulae from some recollection of basic principles and your recollection of trigonometry. At one point during an exam in university I did forget a couple of the formulae, and I did need to re-derive the formulae from basic principles before finishing the exam (fortunately it was not a particularly long exam).
You could go over this with your tutor, and also go over example problems as they might appear on exams and talk about techniques for solving the problems.