It is not possible to carry a dead baby for even a month as the uterus aborts it naturally after the death and before maceration occurs.
Your concern about rapid weight gain and occasional abdominal pain can be hormonal in cause and you need to visit your physician for the same to get evaluated for possible hypothyroidism or PCOS.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.