hello there, I have gone through your query and I see two possibilities here. As you have mentioned you have a family history of diabetes. Now when our blood sugar levels fall which is known as hypoglycemia we experience sweating and feeling weak, so I suggest you to keep a glucometer with you and check your sugars during this episode. Suppose your sugars come normal then you must be suffering from panic attacks. In panic attacks you may also feel tremors of hands, chest pain, difficulty in breathing and uneasiness. I suggest you to consult a psychiatrist for this and start on SSRI group of medicine with tab clonazepam which can help you during panic attacks. All the best