What Causes Chest Pain And Shortness Of Breath When Diagnosed With Anxiety?

Last week I admitted myself to a local hospital. In the last year four family member passed away including my mother grandparents and uncle. I was diagnosed with major depressive disorder but I think I have PTSD also as my mother died with her eyes open and me holding her hand. The reason I think I have PTSD is what triggered this episode was me picking up an earn that was made for my mothers ashes in preparation for her memorial service. Needless to say I'm suffering from all the related symptoms of both depression and ptsd . A month earlier I went to the doctor and was prescribed Zoloft but the effects were debilitating wrenching stomach pain and diarrhea I lost 12 pounds in a month. I slowly reduced the dosage in preparation of a change in medication to Prozac and before I could change medication I began to have suicidal thoughts which led me to seek help. Now out of the hospital and with a little time to reflect on the situation I'm taking the new medication which is making me confused ,sleepy and full of anxiety. I was prescribed Xanax for anxiety and only take it sparingly when I begin to have chest pain ,stomach pain and sometimes shortness of breath. I have called the hospital and have been accepted into there outpatient program which consists of 3 hrs of therapy twice a week for five weeks which starts this next Monday. I'm hoping that with therapy some of these issues can be solved. Any advice would be greatly appreciated . Thank you , Matt