thyroid help?

Okay so my great grandma and my grandma both have thyroid problems…im not sure what kind though and my mother is extremely over weight and sleeps all the time..she however has never be dignosed with thyroid issuses…i am 19 a little over weight but not obese…but i am always extremely tired even when i get 8 hours of sleep at night….i was just wondering if anyone thinks that i should go get tested or not.