Hi Jamer, glad to hear about stage 4, I passed stage 4 a few months ago so know exactly how you feel!
I have my medical booked for the 31st of this month so, so depending on when you're leaving, there's no real rush. It is better to get it all sorted as soon as possible, but as long as finances/medical/paperwork are sorted a few weeks before you go there's no-one reminding you to do it.