CALL 911 THE SQUAD TO GET HIM TO LOCAL HOSIPATAL NOW
What is his normal resting pulse rate? Do you have a blood pressure monitor? If so, what is his blood pressure. Has he been doing any strenuous work that would cause him to be hot.
I do not like to be an alarmist, but, if this keeps up and his symptoms intensify, please take him to the ER as soon as possible. The sweating causes me some concern as it can be a fore-runner of a heart attack. However, it can also be due to anxiety, has there been any extra stress in his or your life lately?
Please keep us posted and please, like I said, if symptoms get worse or do not improve, take him to your ER.