Before few days i had the FUE surgery. If I have sex on the 5th day, is that fine?

It is best to contact your doctor about post operative care and instructions since each doctor has a different regimen.  It is best to go back to see your doctor to see if you're healing as expected.

It may take six to twelve months to appreciate the results of a hair transplant surgery.  If you are concerned it is best to contact your doctor.

If you have FUE scarring and want to hide it with hair with another FUE harvested from your neck, what will you do about the FUE scarring on your neck?SMP can help cover the FUE scars. 

It is best to ask your surgeon about post operative care as each doctor has their unique regimen.  Percocet requires a hand written prescription. It is up to the doctor's discretion on what medications are prescribed. 

Photos cannot assess if you would be a candidate for surgery.  Usually this involves seeing a doctor in person so you can better understand realistic goals and expectations.  You need to also inform the doctor how low you want the hairline.

FUE harvesting above 2500 to 3000 grafts may appear as donor depletion when you keep your hair short.