My dear it's not really bad what you did,by telling your banker about what you do for a living,in as much as you The country is not good, does not mean that someone who is doing a genuine businesses cannot open up to his or her banker about his or her genuinely business,so what am I talking about you have done very well your money is not a blood money neither is it a fraudulent money ok,you should have be very bold to speak out without any kind of fear, then in the other hand,when you asked if it's necessary to have asked you those questions,well I think it's necessary because when someone come across what he or she have not seen before especially when your account is not upgraded and such amount of money was sent into the account,normally you will to know how come..