Can someone please tell what to do to fix my problem

 

Replace it,

Of course you should test it when its not working but it is common for fuel pumps to work intermittently when they are failing. Sometimes you just cycle the key on and off a few times. Back in the day when I had a no start I would go out in the parking lot and cycle the keys until it would start to avoid pushing it in.

 

Replace fuel pump and fuel filter
​​​​​​​Check your fuse