I tried to post this yesterday and it didn't show up, so I apologize if it's double posted. This is a shorter version so I'd prefer people commented on this if both magically show up!
Since it is diagnostically useful I will start by saying I am a male in my 20s. I have struggled with fatigue since I was 16, but it was blamed on my sleep habits because I was a teenager. Last year (sophomore year of college), I started getting sick with sinus infections very very frequently, and missed a lot of class. Bloodwork revealed I had low b12 and iron; I believe it was serum iron, it did not change my hemoglobin or storage iron (whatever it is that rules out anemia). I started taking reacted iron and a b12 supplement. I was also prescribed celexa for moderate depression and anxiety. My doc suspected I had an ulcer, because I also complained of a feeling of excess stomach acid and I had always eaten many iron-rich foods, but my hemocult test came back negative. My doc said it wasn't clear what caused the levels but everything responded well to supplementation so I didn't need to worry.
Last summer break I seriously focused on improving my health: I adopted a good sleep routine, exercised daily, and ate a good diet (including abstaining from alcohol). The infections went away but the fatigue did not, so my doc recommended a sleep specialist. A polysomnograph and MSLT led him to diagnose me with idiopathic hypersomnia, and he prescribed nuvigil and dexedrine.
4 weeks ago, I again got really sick in the same fashion I did before I started any treatments. It was a sinus infection which then progressed into strep throat because the doctor at the awful student health center told me to hold off on antibiotics. I was pretty much incapacitated, and I missed 3 weeks of class, which isn't acceptable. This was despite me doing all of the above things to stay healthy.
I am being treated for 4 things, all which seem to be interrelated, and none of which have clear causes. I feel like there may be another issue which is causing these problems. I love my doc, but I go to school a few thousand miles away from where I live, and won't be able to meet at length until December. I'm hoping this community can offer some more info, whether I have a clear separate problem, the diagnoses seem to be unrelated, or give me advice on what I should talk to a doctor about. The first thing my doc mentioned was a thyroid problem, so I believe it was included in my original bloodwork, but I'm not sure. I have done some research on my own, but I am no expert and it is way too easy to start inventing symptoms, so I defer to you all, the experts. Thanks in advance!
-Low Iron: No anemia, normal storage iron, responds to supplementation, not ulcer/blood loss, not dietary
-Low b12: Responds to supplementation, but still slightly below normal range on August blood test
-Hypersomnia: Polysomnograph and MSLT rule out all other possible sleep disorders
-Depression: Responds well to citalopram, (I definitely notice when I have forgotten to take it)
Question: Do these share a common cause? What should I do about it?