I know exactly how you feel, 2 weeks before I was so excited and happy, the week before I felt almost depressed!! Almost thinking I can't be bothered with this, I had guests cancelling too at the last minute due to various things and it does stress you out redoing tables etc.

2 days before the wedding I couldn't eat and was bursting in to tears at nothing. Day before I was great and on the day all calm and happy - you'll be fine trust me!

Good luck with all! x