Will I End Up With A Thyroid Condition?

I am 15 and a girl and I am african american.Thyroid conditions run on my dad’s side of the family and some of them have wound up with goiters and everything.None of them lost their hair that I know of though.One does have thin hair but I thin that is due to her age.But my other relative who has it has longer and thicker hair than I do.They all gained a lot of weight though.They never lost it either.I also gain weight pretty fast.I am surprised that I have lost this much.I am super scared.All my life,I have always had a weight problem.I weigh about 170 lbs and am 5"7.However,everyone says I look about 140 lbs.I have lost 10 lbs from not really doing anything,I just suddenly lost it and I haven’t gained it back.(I was 180 lbs and now I am 170 lbs.)I have nice shoulder(okay,it’s past my shoulder) length hair and it is permed and I have not noticed any significant hair loss.But I am scared that I will end up losing all of my hair to a thyroid condition in the future.I show a lot of symptoms of it.I know all of you are going to say,just go get tested for it.Is there anything I can do to prevent this?What can I do?If I discover it early,will I not lose my hair?

I am terrified of losing my hair.It took years for it to reach this length.I already have naturally fine hair and I can’t afford to lose any.I have cried thinking about a possible thyroid condition taking this from me.I am almost to break back down in tears just thinking about it.What should I do?Is there a great chance that I will get it?
Can both types of thyroidism run in a family?
Should I be worried?
Has anybody who has this lost any hair?
Do both types of thyroidism cause this?