i think i have pretty similar stuttering problems to you. im also covert and my silent blocks can go from non existent to invasive. you have problems with those specific words because they are used to ask someone a personal question which naturally can be a bit stressful. while your doctor may be right that your stuttering will get far better if you move (that is if your current situation is tough), seeing a psychiatrist for prescriptions is a muchhhhhh better idea than a primary care physician.