any thoughts on this? maybe split personality or bad memory?

when i was younger i would sometimes feel like i would vibrate sideways like every cell in my body shivered and it would make me dizzy and off balance for a second. and there are huge gaps in my memory but others memories are very clear. my siblings will say remember when? and i don't have a clue what they are talking about, yet they insist i was there and said and did things. this doesn't happen as often anymore and the funny thing is i have a great memory for stuff i've read, numbers, trivia etc. could a person have minor splits in their personality that corrected over time do you think? i should say that i came from a dysfunctional family with our own "mommy dearest" as head of the clan.