Do i have a form of insomnia?

I've researched and insomnia is supposed to be where you just cant fall asleep, but for me, i have no problem flling asleep but i always ALWAYS wake up several hours later and then end up laying in bed for severl hours untili finally fall back asleep, and then i wake up a few hours later (around 5 or 6 am) and then sometimes i fall back asleep or i cant go back to sleep. is there a diagnosis for this or am i just wierd or is this some form of insomnia i dont know about?