I understand your concern. Unfortunately there are no such medicines available to remove memories from a person. You seem to be suffering from adjustment problems with depressive symptoms from whatever you have mentioned. More information regarding your sleep, hunger, energy levels and concentration at whatever you do would be helpful to decide the severity of your condition. However it is easily manageable with appropriate treatment. Some counselling sessions and if needed medical help might be useful for you. I would also be more than happy to help you with that if you are looking for online assistance. Discussions will be held confidential. You can directly consult with me through Practo as needed. Online chat consultation is also available.