Thyroid condition?

Okay…my mom, 2 sisters, a grandma, grandpa nad aunt all have thyroid conditions. I had mine tested last june and it came back normal. I am still experiencing the same symptoms and they are getting worse. My hair is getting more fine and falling out. Im constantly tired and have no energy. Ive been having loose stools almost everytime i eat for the last couple of weeks. I also am losing weight although I have not changed my eatting habits.

Is it time to get my thyroid checked again or could it be something else? Any Advice?