Sleeping disorder ... insomnia.. ?

this is me sitting here 3 in the morning ..i knt sleep at night but i manage to sleep during the day until 6 or 7 in the aftrnoon ( i know is bad)...i did some research and found this insomnia...i dont know what t is ...is it bd ... im lossing my mindd becuz of this.....i need to get sleep at night ... my life is turn upside down ..what should i doo ...