i was diagnosed having hypothyroidism many years ago and was upgraded over time to 250mcg of sythroid, last year was unable to visit doc due to finances,,, recently got ins again and doc started me out on 50mcg to work my way back up,,, my mother , both brothers, aunts, uncles r all hypo,,,my brother had thyroid cancer few yrs back and my mother was diagnosed with pituitary tumor 20yrs ago and during my reading that can cause problems with thyroid,,,should i b worried