Doctors In House Section

I hope in house Docs and all contributors can figure out what this is....

PROBLEM ONE

DEPRESSION FROM CHILDLESSNESS OR OR A MEDICAL
CONDITION?

For almost one year now, immediately I put my head on the bed to sleep I will start dreaming. Even if I mistakenly close my eyes in the kitchen, I will start dreaming immediately. My mind will be very busy till I wake up. I remember my dreams most times and sometimes I forget them. I wake up each day feeling as if I have not slept. I wake up tied and restless. Few months ago, I noticed my left arm aches,  I find it difficult to breath well sometimes.  I buy cough syrup every two months because I have on and off cough. 

I have visited the hospital on this issue. Several test was conducted, all came out fine. My doctor think its  accumulated stress of trying to conceive that has led to depression. Another doctor said the stress has made me not to experience deep sleep which I need, I was given antidepressant which made me sick and I stopped it immediately,  I sleep well and dream less each day I take sleeping tablet few minutes before bed time. My doctor said I should stop taking sleeping pill. That all I need is deep and quality sleep. 

I have been trying to have a child for almost 6 years now.  Hubby and his people were giving me lots of emotional and physical pressure.  The last female doctor I visited  suggested I agree to hubby's request of divorce. I have been single again since few months now yet the issue has not stopped. I still don't sleep well, have constant dream, pain in my left arm, on and off cough. I am really confused. Several questions through Google yet no positive response. 

Please my people has anyone experienced this kind of thing. what did you do?, doctors in the house, What do you think I should do.  I am tied of visiting the hospital without permanent solution to this.