D.H.
I use Nuvaring and yes, the cramping is normal. It does seem to get less with more time using it. Also, I had about 4 months with breakthrough bleeding and even had to go on Estradiol for a couple months to stop it. Be sure to call your doctor if that happens. The Estradiol clears it right up. I haven't had breakthrough bleeding since then. Mine does seem to move around a bit, but never out. It will move higher up and sometimes be harder to remove.
Hope this helps.