There is no magic number that will guide you. If things are out of your control and you need help go. Sometimes we listen too much to what is going on inside our mind. Ask a doctor or Therapist or Psychiatrist what they think.
Okay, so I read the other post and what you said. Sometimes being an inpatient takes time to settle in. You are there for you not others who have had the time to establish themselves. Each person will be dealing with many issues you just can't see it. It never is about the number but what is really going on inside your head.