Suggest Remedies For Pain And Exhaustion After Taking Tamoxifen

Question : I have just finished breast cancer lumpectomy and a breast reduction on the same day...surgery was Nov. 14, 2016... all went great... my plastic surgeon and breast surgeon worked together...they were awesome...in fact, I saw my plastic surgeon post seven week radiation treatment, today. My stage 1 breast cancer was encapsulated, so my prognosis is great. Five years ago, I also had thyroid cancer which was also incapsulated and my entire thyroid was removed. I have also had juvenile rheumatoid arthritis for 43 years.... I have had awesome doctors but feel that I am slipping through the cracks....when I don't feel well my GP's office says that they can see me in a couple of weeks......Here is my dilemma...I was just taken off of Cymbalta, that I have been on for MANY years, and put on Tamoxifen.... I have been moody, sad, cry at the drop of a hat and even expressed to my son that I just don't want to live anymore....I would never contemplate committing suicide...but I am exhausted, my arthritis is painful...which makes exercise difficult... now in the last week, I have noticed that I do not have the breath to walk my dogs, a block down the street without returning and feeling breathless....My paternal family have all passed from heart disease at an early age...Should I go see an emergency doctor, where they have an excellent coronary department or am I over reacting? (The breast cancer was on my right breast....so radiation was not directed to the left side of my heart) any suggestions would be greatly appreciated...I am also on a statin drug to lower my cholesterol! Thankyou