Congratulations on your new arrival! What you're describing sounds really quite normal. The gas drops certainly couldn't hurt, and may help, but what is probably causing the gas is the crying! Continue you nurse just as often as she'll take it (my daughter nursed every hour to hour and a half for 45 minutes or more!). You can try to burp her, but oftentimes, breastfed babies don't need it (they swallow a lot less air than bottlefed babies.)
As tough as it may be, remember that some babies really do just cry a lot. The weight loss is perfectly normal, and she should regain her weight by two weeks, if I remember what my pediatrician told me correctly.
One trick you can try is bicycling her legs. That would often help my daughter get the poots out! Mine was a gassy little thing, and a major spitter to boot.