A brief history about myself:
28 year old female. Diagnosed with Major depressive disorder and generalized anxiety over 2 years ago. Taking medication (Effexor 300 mg per day) for the past year. Since the beginning of this year I have been having some major issues with fatigue. I've always been tired, but it has gotten worse since the beginning of the year and there have been no changes medication wise to point to why I feel this way. I sleep 8 hours or more a night, but wake up still tired. I have mild sleep apnea and used a c pap for a while, but no change there either. I've seen 3 different doctors for my fatigue, and no one had any answers (they all thought it was a result of my depression). After seeing an endocrinologist and running more blood tests, she told me my thyroid levels were on the low side of normal and given that I have a family history of thyroid issues, found it reasonable to put me on a thyroid medication. 2 months after taking the medication daily (along with a vitamin D and iron supplement) I am not feeling any better. If anything the medication is giving me a sore throat often. I have a Feeling when I go back to see by endo that she won't be able to give me any other answers.

Should I just stop trying to find answers and just try to deal with the fact that I may have to feel this way for the rest of my life? I'm out of ideas and it seems that my doctors are too. What would you do?