These emotions are due to hormonal changes which occur during this time in the body. If you are having regular menstrual cycles, then nothing is to be done. Psychological counseling is what is desired at this stage.
Other than that, if your periods are irregular then we can start with the hormonal contraceptives.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.