First let me welcome you to our world wide thyroid dysfunctional family.
Most of those people with positive stories probably aren't here. They are happy and not out trolling for answers. However most of us here are fighting and hypoT/lacking in a thyroid does not mean you are going to be fat. If you get optimal care and treatment of your thyroid, your body will act as normal. Right now your issue could be just thyroid or a few other things tied in. We all have our good days and bad days. Thyroid dysfunction is an excuse to be a bit looney and have mood swings. Medication does help!
I lost 45 pounds by weight watchers.. then my thyroid died or went into serious death throws. I have been gaining weight back since.. but since starting meds in January I have been holding steady and loosing a little bit. I still have 25 pounds to relose and another 15 I want off after that.. but I am not giving up hope. You shouldn't either.
You can not give up and let a tiny pain in the neck keep you down. Nope yank that sucker and move onward. I do recommend you jump in and become thyroid savvy on your own. You have to be aware of what is going on with your body and make certain your MD is on toip of things and not giving you just minimalist care. You have already met with one thyroid dummy or more when it comes to MDs. Now you need to educate yourself so that you can recognize them and fight for optimal care. Unfortunately just because they are MDs or Endos does not mean they know everything or keep up with the latest protocol in thyroid care.
Go to my thyroid care and concerns post. I will add it in with the edit function in a bit. It has the basics and more that I have learned from here and researched.. from over 7 specialists and checking up on 5 MDuds I went through. I have been compiling all my research and information from others and have started something new where we can combine resources and information for all involved. All in all it is a place to gripe vent, learn, and ask questions. Visit or pass it by.
On the upside.. I am still fighting, but my mom is the oldest of five sisters. All of these sisters have autoimmune inspired thyroid dysfunction. Four out of five have managed to get optimal care. Some more recently than others. Ubfortunately, they didn't have this board or the internet at theior disposal, they struggled an average of 13 years to get where they needed at the whim of their MDs. Don't let your struggle go that long. Learn to find the one MD that will listen and work to find what is optimal for you as well as manage your thyroid care to the best of your ability.
With that said..
What are the values of your TSH (3rd Gen), FT3, FT4, and did they check you for Hashimoto's? If they are going to biopsy/perform a partial/total thyroidectomy you will learn soon enough. But having a baseline how high have my antibodies gone is beneficial as well. The antibody tests of choice are TPOAb with the cross confirmation test TGAb.
I am sorry that you have joined the realm of the dysfunctional, but you are welcome and we will help whenever we can.