Congratulations on getting through the rest of it! It's a pretty thorough medical but the NATS AMEs are, in my experience, a top bunch of really good people who will put you at ease. You don't have to be Superman to get through it, but they need to be sure you're not going to keel over in front of a radar screen - if there's anything wrong, they'll find it, which is actually pretty reassuring, and not necessarily a 'fail' either.
Good luck, and try to relax (which will also keep your blood pressure down!)