What Causes Sudden Onset Of Weakness, Body Twitching And Heaviness On Chest Area?

Question : Good evening!

I would like you to give me a second opinion on the health problem that I encountered over a year ago. I should first state that I presented myself in hospital (A&E department) under highly suspicious circumstances. I arrived there with numerous symptoms that persisted for about a week. My symptoms were the following: overall body weakness, heavy chest area, severe twitching in my body, waking up feeling cold in the mornings (my hands were extremely cold). One night when I fell asleep in hospital (I was not given any medication at that point), everything appeared dark and black, I did not have any dreams, I was aware that I wanted to fall into deeper sleep, and then all of a sudden overall body contraction/spasm woke me up. I found myself absolutely soaked in my sweat (I was asleep only for some 45 mins that night), my hands were numb and cold, and my body felt cold too. I noticed that my body temperature for some reason would drop more than usual at night. The doctors prescribed Olanzapine, the only effect that it had on me was that it stopped that severe body twitching. I stopped the medication myself, I took it for about 5 weeks. What I found out later, was that the body weakness would persist before my menstruation, I would also encounter severe abdominal pain just before my period and feel sleepy, drowsy, weak (that had never happened before). I sometimes feel chest pain.

Was there anything I may have ingested that could have caused all of this?
All of the symptoms appeared at once and all of a sudden. I had never had any mental issues in my life.
The doctors did not perform any tests when i was in hospital and never told me why it was severely twitching in my body.

Thank you very much!

Hi Doctor,

I would like to thank you for your answer.
That's what my doctors told me as well.
But could it be that it was Pentobarbital (taken with food) that caused havoc in my body, and then Olanzapine reversed Pentobarbital's effects in my body?
Up until these symptoms happened I led a happy, stress-free life. And all of these symptoms developed gradually over a very short period of time.
Is pentobarbital easily detected in blood tests?
My blood test was performed only a few days after I started taking Olanzapine. My inorganic phosphate was lower than it should have been at that point (according to lab norms).
Also, body twitching still occurs sometimes (happens more frequently if I take Zentrum vitamins). And sometimes before falling asleep I have a severe whole body contraction/spasm. Does that indicate a nerve damage?

Thank you for your help!

Hi Doctor,

I've just had another look at my medical report and what I've found is that my urinalysis came back positive with ketones, protein and blood present. Urinalysis was done while I was in hospital and doctors were trying to diagnose my condition. I was not receiving any medication at that time.
Does my urinalysis confirm that phenobarbitone may have been present in my system?
Is phenobarbitone the same as phenobarbital? What is phenobarbitone used for?
Will it stop twitching in my body? Is there medication for it? Would vitamins help me or do worse? Would there be health problems for me in the future? and will I be able to conceive/have children even though it twitches in my body? Would you suggest any test to find the exact cause of twitching? Is it brain damage then?

Thank you very much for your help!