Hello, I've Been On A Stressful Time In The Last

Hello, I've been on a stressful time in the last two weeks, lately I haven't felt too good and started getting a headach for two weeks straight, I have chest pain to the left side ,it's not a hard pain but like a dull pain ,the feeling in my left arm and hand gets to hurting once in a while and pain seems to radiate to my underarm,I have a little stomach pain, I have been pretty stressed out ,but no if this is associated to stress or it's something else,,I had a heart murmur a couple yrs ago,I don't smoke cigerettes as I was told to quit by my dr six years ago,but sometimes it feels like I get short of breath,my head constantly hurts and nothing eases the pain.