Funny thing about human perception... my backpack felt quite light as long as people were driving me to & from the airport in India ('cos then they carried it), but when I started thinking about lugging it around Europe myself, it started to seem heavier & heavier.
I unpacked & repackaged frantically as though that would make a difference, and left the house in a mad scramble, only to realize I'd left my headphones behind. Argh! I obsessed about it through the drive to the airport & the 30 minute baggage drop line - apparently in India everyone checks in online so the line is loooong. Also, judging by their luggage, everyone was relocating to London for good. What only did they leave behind in their houses? (Probably not their headphones).
I finally got to the front of the queue and was told I couldn't get on the flight to Rome. Way to put the (not really) heavy luggage & missing headphones in perspective! Here's the thing they should really write on the British Airways website - it's ok to transit through Heathrow London when traveling to India, the US or Canada (all of which I've done in the past) but you NEED a transit visa if you're touring to a Schengen country. Brand new info for me. Consider this a public service announcement and pass on the word - this is a BA policy not a UK one.
Here's what I learned about myself: when there's no one else around to be calm & mature, I don't burst into tears/cussing. I started planning cancellations & rebooting while the ground staff started asking various senior people if there was anything they could do. Fortunately, since I'm eventually going back to North America, they declared that as my final destination and waved me on my way.
By now I only had half an hour to go through immigration, security, AND calling the family to update them. And the entertainment system for the entire flight was down so I watched Hunger Games on loop for ten hours. But I was the happiest I've been in ages. Like I said - it's all about perspective.