What could be wrong with me?

i've had a loss of appetite for a little over a month now, I noticed I have no appetite, sometimes I feel a little hungry but i'm just not really in the mood to eat but most of the time I don't feel hungry at all and i won't eat eanything. i also get tired a lot even when i wake up in the morning i still feel sleepy and want to go back to sleep. (i know this is random but i also notice i get irritated easily) i thought it was because of my iron levels but my doctor said there really isn't anything wrong with my iron levels and that it's at 11.4 or 11.6 (i can't remember) and she told me the normal levels are between 12 and 16. i asked her what could be wrong and she couldn't tell me. and she told me i'm not anemic. could it be stress? my mom says she thinks im pregnant but i don't think i'm pregnant because the 3 times i did have sex within this last month my partner wore a condom. i'm so tired of feeling sleepy all of the time and i'm sooo tired of not having an appetite and not wanting to eat. what do you think? have you experienced lack of appetite tiredness while you were pregnant? i hate having to force myself to eat i've never been like this before, i love food but it just seems like i dont want to eat and i've been feeling like this for a month now