1. Call 911 and help the friend make sure they are breathing
2. You would get a napkin or any cloth and hold the nose gently. make sure there head is up.
3. yes it is an emergency situation because they could have something medical going on. And they could have hit there head.
Your heart or lungs may not be strong enough for surgery, your body might not be able to tolerate anesthesia, and the surgery may do harm to your body instead of it doing something good.
Pill
Iud
Implant
Pull out method
Ring
Yes it could be circulation problem.