first let me encourage you to see a psychologist or psychiatrist about these severe mood swings. if there is a dx to be found, they should be able to dx and possibly meds to stabilize your mood swings...i'm what they call a rapid cycler...sort of like what's goin' on with you,up/down/up/down, and i'm dx BPD with hypomania.
i always thought of myself as depressed...as a child...had a lot of anxiety too. as an adult i went into a severe depression, then feeling like i could do anything/manic. was hospitalized and dx'ed. it was interfering with my life to the extent i knew i had to get help. it took so much mental energy to exist. i knew something was wrong. hope this helps.