FlGirlyLawer,
I did a search and am including a link for you.I didnt read where Vioxx causes weight gain.I would be willing to say that since you recently had Surge it stressed your body(even though you arent eating)and perhaps you've gained a bit of water weight.
I would go into pdr and search and also would consult your Doctor and see what he/she says.
I hope this helps and pray you feel better soon