Recurring issue. Psychological or what?

I can not describe the situation which I face. But I can relate it to condition when someone is over drunk and keeps on losing and getting consciousness. Person will never fall asleep and he will be acting normal. I feel sudden unconsciousness for some time while awake and during that I may be acting normal and then when consciousness comes back I feel what I was doing that time or I do not remember what I did during that time and I feel what I was doing during that time. This may happen during any activity. I once lost control of riding bike and fell and then i thought how come I fell. Is this something psychological or what? I want to know reason and treatment. This issue I have been facing from childhood.