dont know whats wrong with me, advice needed?!

hello, my names Natasha and I'm 22, basically back when i was 15 i had a very late night out with some friends in the morning when i woke i was still extremely tired, someone knocked the door and i went to answer and i just ended up on the floor! its like my brain had some kind of spasm and my heart was racing i had no idea what was happening, i then went to the kitchen with my friend to tell her what ad happened and it happened again without warning, i just went flying across the kitchen, she said that it looked like someone had pushed me. so i went to the doctors and they ordered that i have an EEG suspecting that i may have epilepsy or a tumor, but the test came back clear.

from then the doctors just said that they couldn't help me so i went years without knowing what i have. my seizures started to calm down up until 2013 when i had my son, i was very sleep deprived and always tired and that when my seizures came back, one morning my sister came over quiet early and i went to the living room ad sat down to eat breakfast and the next thing i know my hands just flew uo into the air and my food was all over me and i felt like my brain was twitching! another time i was cooking over the hob and felt absolutely fine and without any warning sign i just flew back and landed on the ground and my sister said it looked as if i had been pushed! 

my seizures vary though they are not always so bad that i end up on the floor, sometimes when i try to concentrate my hands start to jerk and my brain starts jumping about like its going on and off, its like the more i try to concentrate the worse it is, if i try to move something with my foot i go into a twitching mode or if I'm trying to put my sons books back and turning them the right way round my twitching kicks off! 

i really need help its getting me down, i have been suffering for 7 years now and really just want to get it sorted but the doctors just seem to not really care, i have been sent for cardiac tests and its nothing to do with my heart, i think its obvious that its neurological.

if anyone could give any advise i would be ever grateful 

thanks

natasha