Thanks for your question on Healthcare Magic. I can understand your concern. Yes, you should definitely concern for this lump in pectoral region. You are having strong family history of cancers especially breast cancer, so we should definitely investigate your lump. So consult doctor and get done clinical examination of this lump. Also get done mammography and ultrasound examination of left breast and axilla to know the exact size of the lump and axillary lymphnodes are involved or not. You may need fine needle aspiration cytology (FNAC) or excision Biopsy of the lump to rule out breast cancer. Your bloating is mostly due to GERD (gastroesophageal reflux disease). So avoid fatty food and alcoholic drink. Take pantoprazole tablet on empty stomach. Consult doctor and discuss all these for the diagnosis of your pectoral lump. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.