Swtrigal

I am a 56 y.o. very active female who has been in good shape the last 20 years or so. To make a long story short, I have lost 20 lbs in 3 months without even trying..I was at a normal weight of 132 and now am 112 lbs. Now in the past I would have welcomed and even tried to "lose that last 5 lbs I put on in Menopause" But this has me a little worried..I have normal blood work and NO I do NOT have an eating disorder (seems like docs want to go directly to this-geez). I get hungry but I fill up very easily..I have not weighed this little since I was 11 years old.
Bottom line is my family is freaking out! Me not so much until a family friend who is a physician put the fear of God in me about this glaring symptom. I do not have any other symptoms except constipation (have had this to some extent last 15 years)..I have a vague pain in my lower left abdomen that has been there for years. I requested an ovarian ultrasound 3 years ago, which came back negative.
After my doctor hesitatingly referred me to a GI doc, I am now getting a CT scan of abdomen, colonoscopy, endoscopy, mammogram, and upper GI. I guess I would love any feedback here. I can barely find anything online about unintentional weight loss as being the only presenting symptom with cancer but of course this is what worries me the most. Has anyone been diagnosed after just having weight loss alone? I walk away feeling like a hyponchondriac every time I leave a doctors appt. right now!
Thanks for "listening"..