I think i might have bipolar disorder?

i only either feel 'up' or 'down' - rarely ever anywhere inbetween. when i am 'up' i feel so confident, reckless, happy with my life, 'on top of the world' and like nothing could ever go wrong. i make big plans for thw future and start projects. but then that fades away (after a few days, sometimes hours) and i feel like the ugliest fattest stupidest most worthless and pointless person. i feel like things will never get better, and on more than one occasion have considered suicide (and attempted once) but then go back to feeling 'up' again. i don't really have any happy medium anymore. when i'm 'up' i make a fool of myself and say stupid weird things, then when i'm down hardly talk and hate everything and just want to be alone. is anyone else bipolar? can you relate, does this sound like bipolar disorder? i'm seeing a counscellor soon, should i tell then that i think i could have bipolar disorder? any infomation would really really help at the moment.