Depends where the pain is Bhen, if its the pain in your cock as it tries to get erect....sorry, that's everytime you try to get a stiffy. If it's in your scrotum or other skin....maybe fit related, maybe just breaking you in. Try starting with a few hours a day and build from there.
Yup, depends on the device and the type of pain. For example, I occasionally get a bit of burning from mine. It typically means I need to lubricate the silicone tubing I have covering the hinge so the skin can move cleanly against it. If it's a dull ache, I'd ask if the overall color and temperature are "normal" for you. If the fit's right, blue balls is more of a metaphorical problem because the literal version typically means a lack of circulation.
Well, if you had a tight squeeze to get each of them through a ring, you may have just bruised yourself a bit. That'll generally subside. But if it's constant, something might be up. With a good fit you shouldn't really feel any overall discomfort save for the occasional pinch or pull. Remove it for a day or so to see if it stops.
So long as the boys are pink and warm just suffer xx If it's not getting worse and is just letting you know they are a bit uncomfortable then you should be OK Xx Wendy