Hi, I Am 33 Years Female.i Have 4 Years Old

Hi, i am 33 years female.i have 4 years old son.i have thyroid and i take thyronorm 50mg.i have low bp 80/110. My weight is 60kg. But i get anger like anything.i shout and beat my son. I feel am over tensed but could not control myself.also i get hungry a lot in mid night when i get up to pass urine.i am not sure whats happening in myself