Hi salma, you mention that you had thyroid since 1 year ,that is before the baby was born. If you are hypothyroid you need to get your thyroid profile including freeT3 &T4 TSH
. Depending on these levels the dose of elthroxine needs to be adjusted. If required then you may need to get your thyroid antibody levels also done at a later date. Your weight gain could be due to hypothyroidism
or may also due not being able to shed the weight gained during pregnency. You need to excersise and go on a strict diet regime where you should avoid high calorie food and instead opt for salads, and high fiber fruits and vegetable. Overweight
condition is totally treatable only you need to be firm with your diet and follow some sort of exercise routinely. Do not binge and do not dispair, get the optimum treatment for your hypothyroidism and nothig can keep you fat for long. Take care and be happy.