Have Abdominal Pain And Lower Back Pain, Light Headedness, Shallow Breathing, Feeling Faint. Normal Blood Test

I experienced abdominal pain and middle to lower back pain that would peak while I slept. These pains lasted about three weeks and have since died down, but the light headed feeling, shallow breathing and faint feeling have not gone away. My chest sometimes feels tight and my throat constricted. When I move my head side to side it doesn't feel like I'm in control. My reactions are either slower or faster than my control. My blood was tested and is normal as well as a screening for anemia, diabetes, thyroid, and bladder infection (for other symptoms) and all came back normal. My arms feel numb and I feel like my body temperature is irregular. Last night I shook uncontrollably as if I were freezing, but I wasn't. These feelings always get worse at bedtime.