Thanks everyone.
Beautiful_Disaster - sounds like you really can relate! Perhaps you may have agitated depression too? I know what you mean about avoiding conversation, i generally do when i'm agitated because i know it'll just wind me up further. It is though something in my brain wants to niggle and run circles around the other person and triumphantly shout 'ah ha you see what you said makes no sense, please do not talk unless you are going to say something useful as it is a waste of good oxygen!'. How awful is that?! Do you feel you have an awareness of how you act? I do, but if i don't do what my body/mind wants to do/say i feel even more tense. Let me know what you diagnosis is, and good luck with the treatment, you deserve the peace of mind!!
Pomegranate - you hit the nail on the head, i hate the depression periods but it is the agitation that feels more out of control. I've never mentioned these feelings of agitation to any drs, but i'm guessing it was evident at the time of being diagnosed. To be honest i'm not sure what my actual diagnosis is, i've heard clinical depression, agitated depression, depression with some psychotic features, recurrent depression. I generally say its agitated depression so that people understand that i can be depressed without looking like someone with melancholic depression. Besides it doesn't seem to make any difference what they call it, they just hand me some pills and say good luck! The problem is whichever depression they want to say it is, it is not a stable one and therefore i can't overly count on myself not to be self-destructive. E.g. recently i was on ADs for approx 1yr but then my mood twisted downwards and i got angry and decided to just quit everything cold turkey in some random rebellion. Unfortunately no dr seems to believe this because i seem so responsible! Thankyou for your help. It is really good that you have perspective on your mood now.
Amazonmom - thank you for understanding. The agitated depression is horrid isn't it?! It is negative energy. I've been trying to notice patterns in my depression periods also but once i get out of a slump i generally don't want to remember being in it and i find i'm very much in the mood of the present so sometimes cannot remember being that depressed. I am well known for my convenient forgetfulness! 
It sounds like meds are helpful. Do you do anything else to help calm yourself during the agitation? Thanks for the support!
Nightbird - thankyou! I have a therapist, i've been going for about 5 months now. The difficulty i find is remaining consistant with it. When i'm severely depressed i cannot communicate at all and i don't feel anyone can help me. When i'm feeling fine i don't have anything to say . And when i'm agitated i just want to spend the whole time yelling at her, and bound around in my head like a ping pong ball. I always turn up but we do seem to dance around the houses and i don't always feels she gets how up and down i can be. She asks what the issues i want to resolve are but it changes depending. I've never tried yoga before, i don't think i'm all that flexible but i've heard many people advocate it so i may just try.