Hi doc....what is the problem for having a spotting within 7 days after a week of the regular period? and and next month of my regular period, i had a

Many possibilities: If sexually active need to take a pregnancy test and seek urgent medical attention if positive. Otherwise a variety of possibilities. Here is some general information however for specific diagnosis you will need to consult a doctor and may need examination and or tests run https://patient.info/health/vaginal-discharge-and-vaginal-bleeding

Can be normal: I would suggest that you keep a calendar of your bleeding to better look for patterns and then we can consult with you better about what may be going on.