What Causes Discomfort And Headache After Laparoscopic Surgery?

I had laparoscopic surgery 5 days ago to remove my remaining ovary due to a large cyst that had grown over it. (I had a TAH with removal of the cervix and right ovary 6 months ago) I was feeling wonderful up until today, and now I feel absolutely awful. Slight mild headache, pink mucus when I blew my nose and overall malaise.