See how you feel with cinema. It might even help to get some fresh air and move a bit more. But really gauge how you feel, and if you don't feel up for working, then you've got to get a second note, regardless of how it looks. It'll look work if you flake out at work.
You and your mate's wedding are on the same day? There's a film in there somewhere

I reckon you could get away with missing the night out, a relaxing spa and meal might be good for you too.
Don't fret the wedding things. This is your wedding, not theirs, so if you need to rearrange, the people can work around you. It'll all be sorted, don't panic, love
If you're feeling hungry as well, that's a good sign, getting appetite back is a sign of improvement. While you're healing, if you're hungry I say eat. Obviously not rubbish, I'm not saying Cadburys and Walkers, but fruit, porridge, nuts, seeds will all be good ways of restoring your body to health.
Enjoy cinema, sweetheart!
Bron