2 months I've had a growing golf ball sized mass in my neck, after 1 and half months it spread to my groin & surgery to remove several inguinal nodes. The pathology post op diagnosis was left blank. I've lost 60 pounds with no effort, I wake up every morning drenched from night sweats, and it followed by daily diarrhea. My condition has not improved and I am continuously losing weight. I have a consultation with an oncologist in 3 weeks but I feel myself deteriorating. Should I wait or go to ER?