Gyno and endocrinologist?

im 17 about to be 18 in august and ive been over weight and could never lose the weight no matter what so i went to an endocrinologist at about 13 he never really did anything and didn't listen when i said i always had a headache other stuff, i know i have a thyroid problem but he didn't do anything for me so i recently went back because im almost 18 and have never had my period that's. he hasn't done anything but give me the same thing and they aren't working so would anyone know of a good gyno in IL that takes the all-kids aka Medicaid and also an endo? or even ones that don't take it. i really want kids and to be happy with how i look so i need this done before i am kicked off insurance. any answers are appreciated thanks a bunch. also i live in the joliet area and went to dr. ziai