I noticed an increase for the first couple months. It makes sense, as your vagina is made to be a self-cleaning device, and it's hosting a foreign object.
As for the cramping, I've had issues with that any time I've switched birth control methods, even between different pills. It could also be that you haven't figured out the perfect placement for your body yet and it's putting pressure on your cervix. For me, I have to make sure the top of the ring sits behind my cervix or the pressure really bothers me.