Sleepiness, obestiy, and depression: Endocrine disorder or l

I have been asking all over to figure out what is wrong with me but it just seems like no one believes me when I explain to them what is going on. They just think I'm a lazy fat girl who doesnt "want" to make anything of herself and her future......especially my parents.

I am constantly sleepy and tired....infact exhuasted would be a nice way to put it. I don't go to school (home schooled....sleepyness was part of the reason I left school in the first place) so I have plenty of time to sleep.....usually 14-18 hours a night on average, I can't sleep anymore than that cause it just gets uncomfortable and my back starts hurting from laying so long.....but if I could I would sleep alot longer. I wish I could sleep all day, I'm just too sleepy to fully focus on anything, even if I want to.....it's as if I have no choice. As if I am a slave to my sleepyness. I have a huge problem with waking up in the mornings...im not sure why, even if I want to it's impossible to get myself up and out of bed.

I can drink all the coffee and energy drinks I want and take all the cold showers I could possibly take but it makes absolutely no difference, it's like the coffee goes in and just sits there, nothing at all happens except for a stomache ache or two cause of the irritants....my eyes are always so heavy and it's impossible to focus on anything. My parents think I'm just lazy and that I dont want to exercise and lose weight (which I would do anything in order to be able to do), but I can't manage to get enough energy to burn any amount of calories. I just feel if I were more energetic and awake I'd finally be able to lose weight and not gain it back times 2.....maybe I could even graduate by next year (I can finish school on my own schedule cause of my online academy. As long as I can stay awake long enough to finish a coarse or two....or if I had enough focus and energy to.)

I persuaded my dad a while back to talk to someone (doctor friend) about my situation and the guy told him i'ts nothing, just me. He said I don't make the effort.....fact is I shouldnt HAVE to make such an enormous effort. I should be able to wake up and stay awake effortlessly, I mean the human race has been doing this effortlessly every day since the dawn of time......why must it be so difficult for me???

I don't think I have any other symptoms or problems, my knee's don't buckle simultaniosly, I don't just faint and fall asleep...or lock up all of the sudden, I do find it difficult to wake up and can fall asleep any time, any place as I please but other than that I don't think I have any sorts of sleep-breathing problems.....just breathing trouble in general whilst I'm awake ( I have a BMI of 35.2, it's not unexpected). No leg/foot tingling......hmmm, what else, well I think thats about it for symptoms, or as far as I know atleast.

Oh and I almost forgot to mention, I have been having these sleeping issues since I was 13-14 and it got a whole lot worse and out of control over the time untill at 16 I left school. Now I can't keep a single job, no matter what time of the day I need to work.....no matter what I have to do, it seems as if just keeping my eyes open is enough to tire me out completely.