[Corryikilelet]

I feel really defective and feel like I need to submit myself into a mental hospital place for a week or something.

You don't want to go into a mental hospital brother. They aren't usually particularly nice places.

Go see your doctor and tell him about your OCD and low self esteem issue, you may benefit from medication.

Pray the prayers normally and stop messing about and making things complicated for yourself.

Allah doesn't impose a burden on anyone greater than they can bear - so don't you do that to yourself.

Go talk to an Imam or a wise Muslim about your situation so they can advise you what to do.