Or maybe she just needs a large penis to be satisfied. Clit, yes, that definately helps, but you can't say that is what is wrong here.
If she is being verbally abusive towards you, hun, then I would definately consider leaving her. However, she told you that you and your size are fine, so that wasn't being mean or anything. Some women just prefer a large penis. And, length and girth matter. It all depends on the woman. Whether they like them big, small, long, short, fat, skinny, etc. So, no one person can sit here and say size does or doesn't matter, it has to be thick not long, etc., because it is all a matter of preference.
Maybe you could use the vibrator with her? I mean, on her, not yourself of course, unless you are into that. Have sex, but then maybe when you are done, or as fourplay, use the vibrator.
I wouldn't know if the pills work, but I am doubting they do. If you have the money to try, then ask your doc which ones work/dont work or if any of them work. But, if you dont have they money to blow, or if they cause health problems then I wouldn't even try it.
If she loves you then she will make due (which it sounds like she is doing with the vibrator). But if she start being mean about it or ignorant then don't put up with that.
I use klear action which is generic proactiv for my face and it works great. It should work on your back/shoulder or whatever. You can buy it online at ebay or drugstore.Com and it is under $20, where proactiv is like $50 or more. I like it a lot. Good luck.