I was in the hospital a few days ago too, I got antibiotics for PID caused by BV. I also got a kidney infection in March (turned into a stone), then a bladder infection in May, and then another kidney infection just at the end of July. I find the antibiotics take a few days too get out of your system and those ones paticullarily make me ill.
I also get naseous from pain but here's a few things I'll have on hand for that.
Anti-nasea bracelt (wristband that pushes on a vien) I have the 'sea band'
Gravol with ginger
Dried ginger chews
Tums (or other antiacid)
After eating I always take a tums if I'm feeling sick before, instead of chewing, I really reccomend letting it dissolve in your mouth so it doesn't hit you all at once and also I find them gross to chew. I used to take Gaviscon (not sure if I spelt that right) but it was too much.