Jaw cancer. My wait 12kg after surgery.

I operated my jaw cancer on 26th April of last month with flap from chest muscles. My throat is still tightness. I am taking liquid and soft food. From last six days I feel something is touching in my throat or something stuck in my throat. And my stool is not clear and bleeding from my stools with pain. I asked with my surgery doctor he told me that nothing for worry. It may be possible due to surgery that something stuck in throat and due to change in digestion or folding it may be possible bleeding from stool. He prescribed me some medicine for stoop and suggested for colonoscopy and endoscopy once. Please suggest me what should I do now. I m feeling not well. I have also lost my wait 12kg after surgery.