I was just put on Talwin NX today and not doing well it seems.I have only taken one tablet so far and have most of the overdose side effects.the only thing I'm missing from the side effects are the seizures hallucinations and nightmares because I'm scared to go to sleep.I took the drug at 7 p.m. Tonight and it is now 2:24 a.m. In the morning.still feeling the same and nauseated when and how long will this go away?