Confused?

Bipolar disorder is not uncommon to my family, and recently I was diagnosed with depression, the docs say they are unsure if it is bipolar or not...and they tell me it will take time to "come out"......anyway they told me to watch for "hypomania" and "depressed" moods..I am currently on lexapro which has def made my mood swing easier to deal with....but I am still fighting sudden mood changes (in the sense that I get instantaneous mixed emotions, that I cant truly describe but you can tell the change in mood immediately from my physical response)...anyway I also have times during a day, or for several days were I have extreme energy, I talk a mile a minute and get a lot of work done and I overwhelm the people around me, when this is through I am exhausted...I also have down days, but it is not depression, its just me wanting a quiet, slow alone day..does anyone else out there share these experiences?  Does it sound like I may be bipolar...like I said the anti-depressant has helped balance out my mood swings..but sometimes they are still too sudden and too strong to control without a great deal of effort....in addition I have been experiencing these weird "kinda" high energy times followed by exhaustion and every couple of days I want a quiet along day... are these signs I should be looking for or am I having anxiety about all this? I would appreciate any feedback!!!

Thanks Rinnie

Thanks for your input and welcome, I have always had these high energy moods my entire life in fact my family members used to say that I was "manic" as a joke, prior to my world falling down this last time!  I have been on the Lexapro since last Febuary/March, (I honestly dont remember), it had def helped me with my mood swings, but at the same time, it has made me very flat, its kinda funny really, before the lexapro I was generally numb (except during my outbursts) now I am not necessarily numb, but just flat!  Anyway thanks again for talking with me!

Rinnie