Hello and thanks for asking JA. It sounds like your son may suffer from bi-polar depression. He has some of the symptoms for mania such as overspending talking too much, irritation uncontrollable behavior. I wonder if he spends more than 5 nights without sleep
The primary symptoms of bipolar disorder are dramatic and unpredictable mood swings.
Mania symptoms may include excessive happiness, excitement, irritability, restlessness, increased energy, less need for sleep, racing thoughts, high sex drive, and a tendency to make grand and unattainable plans.
Depression symptoms may include sadness, anxiety, irritability, loss of energy, uncontrollable crying, change in appetite causing weight loss or gain, increased need for sleep, difficulty making decisions, and thoughts of death or suicide.
If your son has bi-polar he will need to see a psychiatrist and get medication and a therapist to receive therapy. How long does the treatment last will depend on the person's response to treatment if the medication works and how they respond to therapy. I would point out the symptoms that you see and how worry you are that he does not come out of his room in a month. Usually after 6 weeks of therapy and medication I see some inprovement in clients. Do you think your son is using drugs?