Severe Pain Back Of Head From Crown To Base Of

Severe pain back of head from crown to base of skull, (esp bendin at waist or lyin down), cold of late esp hands & feet, used to always be too hot. Have pain mid to lower back & found out blood sugar level went from 8.__ to 11.__ in 4 mnths. Poss pituitary or adrenal gland issue? 65 % of liver & gall bladder removed in Apr due to a hemangioma ruptured. Had a total vag hyster in Aug is believed hormones contributed to the hemangioma. On a diet of 500 cals per day, only eating 6 oz meat, 2 servs of vegs & 2 servs of fruit. A lot of wter & herbal tea. Aways constipated. Am obese. Much trouble sleeping. Take hb pressure meds, wellbutrin, paxil tamazapam & flexeril.