I haven't been able to sleep for two days. is it something psychiatric and why?

Maybe, maybe not: It could be many things -- and could pass on its own. It could be something psychiatric, or other things like use of stimulant drugs or withdrawal from others. Or an acute stress response to something frightening. Or hyperthyroidism. If it continues, you need to see your own physician for an assessment in order to learn what's causing your insomnia & treat it. Good luck to you.

Insomnia: Insomnia is very common and resolves on it's own. If it persists and causes impaired daily function please consult your physician.

Insomnia: Acute insomnia can be stress related and sooner treated the better. Chronic insomnia usually defined as insomnia greater than 3 months, is predictive of psychiatric condition in about 50 % of insomniacs, chronic insomnia is also a risk factor possibly for suicide with co-morbid mood conditions.

Insomnia: Talk to your doctor about this to see if you need assessed for secondary insomnia (insomnia due to other organic or psychological factors) which can be treated. Meanwhile you can try the sleep hygiene techniques.