hi i have had a pinch nerve on the 1 st may this year and was given morphin efor 4 days in hospital. i came off of the morphine on 4th may.I am still anxious and about 2 weeks now i am feeling my head is heavy and i cannot seem to focus. Did blood test which came out well except for my bad cholesteral which is 165 and my calcium level is 8.8.my pressure and my sugar is good.but my head feels very heavy. What do u think may be the problem?