I have got a weird problem. During day time all of sudden I feel I am dreaming something about which I have already dreamt many times along with that I feel nausea and dream last for few seconds. After that I don't remember what I have dreamt about and it happens 8 to 9 times a day. Is it normal? Or is it hallucination? Or am I facing some serious problem please help. It's been 2 days and I am really scared.

What is your gender, age, general physical health, any history, on any medications? When did you have the root canal and are you taking pain killers???????

We can't say it's normal, but we also can't say what it is. You do need to see a doctor, and possibly a specialist such as a neurologist. It could be anything mild to serious - lack of good and enough hours of sleep, poor diet, stress and worry, all the way to a real mental health problem, or something like narcolepsy, epilepsy, or similar condition in which brain function works in irregular ways for short periods. Family history is important to get from relatives for something like this, before you see the doctor.

I wrote that before going back to see your post about the root canal. It's quite possible that this is related to that. Call your dentist's office, as well as your doctor, before you start thinking about mental illness or epilepsy.

Yes its normal after what you have been through with this root canal, as well as nodding off from lack of proper rest because of pain, meds, discomfort, and infections.

Healing can leave you loopy for a while but you will recover.