Hello thanks for asking from HCM for your health related queries You have been suffering from Bipolar disorder and have hypothyroidism. Following childbirth you have started to gain weight. You are also taking Propranolol for migraine prevention. A lot of females develop increased weight following childbirth and you are also having hypothyroidism which also increase the risk of weight gain. First thing that should be done is to get your thyroid hormone levels checked. If you have any evidence of hypothyroidism then start taking thyroxin or other thyroid medicines as per prescription. Most of common antidepressants carry risk of manic switch in depression with bipolar disorder but medicines like Fluoxetine can be used with caution in low doses. The drug also don t cause much weight gain and you can discuss with your psychiatrist regarding prescription of this drug. Try to avoid taking Clonazepam in the doses you have stated that is 4 mg per day. This drug is known to cause dependence and the drug carry high abuse potential so try to avoid that drug use regularly. Exercise daily and have diet rich in proteins and complex carbs and low in fats. Visit your psychiatrist for detailed evaluation. Thanks, Hope this helps you. Take care