Hello I can imagine but can never really feel the way u do in such situation. But then why this is happening again is... Probably because emotionally the ability to handle stressors in life is still something that needs to worked upon. Look at it this way... None of us is born as an expert in handling emotions.. But with experiences gained in life we gradually become better in not repeating same mistakes and handle our emotions a little better than last time.. This may happen though that everyone we fail the memories of previous setbacks hit us and make us feel that we r back to same state but then u ll observe that there is atleast  some little thing better this time...