Managed to get some kind of cold or viral infection 4 days before I was due to fly to Japan. Throat is sore and I feel like gooseberry fool - missed out on going to my friends BBQ today and seeing a Ghibli show at the theatre later. What a huge pain in the ass and while I'm thankful it's only this currently and I could change all my stuff changing it was a pain in the ass.
Given I'm not sure if I'm going to get worse before I get better and I was in my free rebooking period so I've pushed my flights and everything back a week. Online I couldn't get the flights I wanted even though I could see that they were available so I had to call Japan Airlines and see if they could help. Thankfully they were super helpful and I got both the flights I wanted, but why couldn't I just do it online, why say the flights are not combinable. Also why now, why did I have to come down with something just before I fly.
EDIT: I was regretting doing this but slowly but surely my temperature is going up and up when the paracetemol wears off so I think I made the right choice.