I'm glad you're home @C4pinkwheels, but sorry you're feeling so crap.
I second getting hold of some probiotics, that will help your gut deal with all the antibiotics. If you can get your DH or PA to go to a good health food shop, assuming you are near one of course, and get them to get some that are in the fridge - they will be much better quality.
In terms of food, I'd say at the moment that you should just eat what you fancy. Don't be so hard on yourself. I know you don't want to put weight back on, but now isn't the time to be worrying overly about your food - you need to be focusing all your energy on getting well.
I'd even go so far as to suggest that you start your day with some wholemeal toast, with peanut butter. Nice and savoury, and easy enough to digest. Also high protein - and the carbs won't be that high (as long as you can keep it to one slice!)
Why not try browsing the recipe thread to see if anything there takes your fancy?