Asked for female, 26 years old from Bangalore
First of all I'd like to tell you that try to accept the change in life. Accept that past is past and you have to move on. You have to convert the pain, stress and frustration into positive things. Try to find motivation to move up in all what happened to you after break up.
It's common to have aggravated depressive and anxiety symptoms after break up but in most individuals these don't last more than 6 months. These symptoms of adjustment disorder usually remit by own. The poor memory, stress and anger are due to lack of focus. To come out of these symptoms stay outdoors as much as possible. This will help you to distract yourself from past. Try to find a new hobby and if possible learn it or complete it. Reading, completing a new course, gym etc are options. Try to find interests in these things.
If symptoms are severe and persist then visit a psychiatrist for help. Medicines like SSRIs can help to reduce the depression. Fluoxetine or Escitalopram can be used for short time and will help you to come out of depression. These are safe medicines and can be used without any worries.