What to do =/

GAAAAAAAAAAAAAAAAAAAAAH I need to change!!!! And soon I can't go on like this!  I am now seriously questioning the fact am I really depressed or not!!!!!!!! I have said it countless times in the past that I feel depressed but never really known for sure if I am actually suffering from depression. It seems I tick a few boxes in the Depression category anyway, maybe that answers my question. I didn't know it can cause you to get really Forgetfull. Hah. Well, not so funny. Since its fucking true. Feel like a 90 year old woman instead of fucking 21!!! I have been forgetting things. When I say this I mean pretty serious things.... to do with work. How can I forget something basic as an animals name and what it had done that SAME fucking day. There were quite a number of animals in, not the point, I'm young, should be able to remember things. To get to the point, I looked up what causes forgettfullness, as sad as I am. And well lets see....."Always thinks of the past and dwell upon past regrets and sorrows" "Inattentiveness, mind far away from the actual physical surroundings" "Persistent Depression - causing forgetfulness and lack of concentration." Hmmm. Thats the pick of the three that seem to relate to me mostly. Ach I don't know. What exactly would I say to a doctor if I did go and see one, without feeling like a right failure and no gooder.  Maybe its all to do with letting go of the past and really moving on. Easier said that done.