Loss of about 20 lbs. in 3 wks.

If you are having a sudden weight loss with no apparent reason, you might have your thyroid checked. I lost 85 pounds in 6 weeks..turned out my thyroid gland had gone berserk. All treatable, but necessary to check it out. good luck.

Have your doctor check your TSH (Thyroid Stimulating Hormone) levels. This kind of weight loss could be a sign of an overactive Thyroid gland. It's done with a simple blood test and could save you from serious harm.