I think that bed bugs are all over your house. Keep your sorroundings tidy all the time. Try to clean closet by emptying it and put your clothes in your washing machine and make a mixed chemical and detergent. See to it that the solution that can kill insects. Also buy a new bed, mattress & bed sheets. If these won't work, transfer to a new building and see to it that you will not carry bed bugs along with you.