I always like to do a bit of research before I go see the doctor.
Here are the top sites I recommend (and my personal doctor said if I was going to look at any sites also recommended).
WebMD (this site is also EXCELLENT as you can put in your medications and it will give you drug interaction warnings for free! I found this very useful).
Medicine / Medication comparison site > https://www.iodine.com/compare/valium-vs-oxazepam