I am not getting erection normally but when I am masturbating I get good erection.i have started no gap today I am on day 4 and I am not able to feel anything below is it normal. I used to masturbate daily from the age of 15 and now I am 25 can any one help me about this
That's quite normal. By masturbating to porn on such a long time you've literally desynthesized your dick, and your brain is getting aroused only by pixels on the screen. If you want your boner back again just stop watching porn and masturbating. After some time you will get that back.
Just keep your mind busy. Focus on other activities. Read some book, start mediation, maybe some basic physical excersises. Anything! By doing nothing you're not safe. Especially in early days of abstinence.