looses my memory dAy by day,me 24 yr stdnt..what should i do???

Since 5to 6 mnth i loose my memory…i am nt able to concentrate on my study…i m the patient of sm time night fAlls…it creats health problem also…what should i hv to eat for making quality spurm & fit mental strengh…what i hv to egnoring?? Pls give me sm suggestn sir…my humble req to u plssss…