Can't study at night! Need help

Yrr kuch dino se raat ko jaldi nind aa rahi hai. Jese hi khana khata hu, 10 min baad nind aane lg jati hai aur padhai me man hi nhi lagta. Padhne ki koshish bhi krta hu toh nhi padh pata toh ab me kru kya. Kyuki jee paas aa rahi hai toh study hours badhane ki soch raha tha but yaha toh aur kam ho rahe hai. Please help