I used to use Nuva Ring and it made me sore and I felt like I had PMS all the time...
I had those periods too and the best thing that helped me was changing my diet. I went gluten-free and felt SOOOO much better- mood, cramping, lighter and shorter periods, and lost some weight too.
I was on years of hormone birth control and I think it really just messed me up worse. I found out recently that I have hypothyroidism, so I don't know if the hormones all those years contributed to the problem or I had the problem to begin with and didn't know and was using birth control as a "band-aid" for the problem of having the bad periods.
Anyway, thought I would toss that out there, since I think sometimes we forget that there are other ways (and unfortunately doctors don't mention it!!)
Here is my food blog if you are interested. I found that corn, white sugar, and particularly gluten all make my periods worse when I eat them.
www.chickiepea.wordpress.com