Why Is There Increased Depression, Fatigue, Vomiting And Abdominal Pain After Pregnancy?

Hi, I am 30yo, 5, 1/2 months pregnant . This is my second pregnancy and it has been very taxing on my health in comparison to my first. My doctor is good but can seem to work out why it is , that when I go to sleep on one side, my arm and shoulder on the other side goes numb with pins and needles. This started about 2 years ago and has been getting worse. Other symptoms are, low blood pressure, lower and upper abdominal pains, chest pains, loss of feeling in hands. fatigue. head aches. vomiting flue like fluid which is clear , not green. These symptoms including the pins and needles in opposite arms are now causing sleeping difficulties and depression. Do you please have any suggestions as to what it could be so I can pass on the information to my doctor to investigate further.. Kind regards , Kelly