Get a CT and you'll know. I know you've been scared to face it. My brother-in-law, he had a tiny tumor in hte liver 8 years ago, it was removed completely, in the past 4 years, he didn't go to his Dr. regularly as he should, coz he was scared, this summer, he had a blood test the tumor marker goes 1000 times the normal range. He had a very big tumor in the liver it's distant metastatic. The best way for tumor is to find early. Schedule an appointment, you got to face it anyway, and it's torturing being in the shed like this.