I have a question for anyone who might know something lol. So I thought I had a thyroid problem, got…

I have a question for anyone who might know something lol. So I thought I had a thyroid problem, got tested and they said it was fine. I have ALL of the symptoms for hypothyroidism. Constant miscarriages, sensitivity to heat/cold, can't lose weight, gaining weight out of nowhere, trouble sleeping, brittle nails, depression,...EVERYTHING!! I looked at my test scores and I scored in a normal range, but very low in the normal range. Is this treatable?? I go to the dr in the morning what should I ask him as far as my symptoms and where to go from here?? After my miscarriage last month, my gynecologist told me to lose 30 pounds before trying for another baby. I CANT LOSE WEIGHT THOUGH!! I've been on a diet for like 2 years (lol seriously) I workout 5 days a week and I'm gaining 5-10 pounds ever other week!! I'm starting to think I'm never going to be able to try for another baby😖😖😖😖