Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. Your daughter is already 19. Eratic behavior pattern as you mention here are uncalled for. She could be going through a rough patch in her life. But the given description is not enough for a correct diagnosis. Consulting a psychologist should help. Remember, psychiatric help is required when the matter is beyond the scope of psychology. If you still need my help, please describe the whole problem in detail and post a direct question to me. I shall definitely help you with psychotherapy techniques to over come your problems. Hope this answers your query. Available for further clarifications. Good luck.