is this depression/dysthymia?

i feel empty, numb, i have no energy do to anything, i can't enjoy anything, in fact i can't feel anything... i had before moments when i felt sad, but now i don't even feel that... i just feel nothing. when i was little i had some kind of energy, little comparing to other kids, but at least i had moments when i enjoyed playing, drawing, watching tv, or talking with others. now i have no passions, no pleasurable activities, just nothing. i feel so tired, exhausted, i just want to stay in bed without moving, and i wish someday i will fall asleep and never wake up. cause it just seems meaningless. i don't feel SAD now, but i just feel nothing....is this depression? would talking to a psychologist be helpful? i'm feeling like i have no reason to seek help, because i don't feel sad. i just feel nothing...

my general physician said it might be anemia or something, but my blood tests were right. yet i still feel the same

it happens that sometimes i get through phases when i feel down and i'm suicidal (i never tried to commit suicide but honestly must say i've projected in mind myself doing it ) ...but i must say most of the time i feel like this. i never have too much energy (only if i don't get sleep 24-32 hours, i'm a little euphoric, but otherwise it never happens to me) most of the time i feel just empty, without energy and exhausted

i'm 21, female

thank you in advance for your answers

Well for a formal diagnosis of Dysthymia, I believe you have to have a steady period for 2 years of mild depression that doesn't include any manic-type of behaviors (as this could differentiate between dysthymia and bipolar disorder). It sounds like this has been going on for awhile. The first thing you should do you did, which was to check for physical causes (thyroid, iron levels can often be causes of lethargy and mild depression). Maybe now a therapist can help guide you in the right direction.

Most likely - you know the drill, get a formal diagnosis, the you can be official.