What Causes Tiredness And Constipation While Having Tumor On Tail Of Pancreas?

Hello, My name is Mary.. I haven t been feeling well for a long time...I am constantly tired and losing clumps of hair and sweaty.. I am 57 yrs old..My the number 1.65 ...and I also have a small turmor on the tail of my pancreas...which is stable... and i don t sleep well and have problems with constipation.... Can you help me out... I