It is very possible to lose the weight. I have had hypothyroidism for many years. When I was diagnosed they thought I might be hypo. I was very, very thin. I still have a tendency
to get that way. Once they have regulated your meds it will be a lot easier. With good eating habits and exercise you will be able to get back to normal. And you will be surprised as how good you feel. You never realize how awful you really felt until you feel good again. Good luck. It does get much easier.