Have you already been to a meeting Sarath? If not, please do. I have no magic wonder pill ore trick, I wish I had. My recovery isn’t yours and vice versa. What I used myself when I had a relapse is that I tried to learn from it: what can I do different next time to avoid a new relapse.
How can I make myself stronger ore how can I avoid things that are triggers? How can I push myself forward past the 3 months mark (I used to relaps every time around that milestone).
We cannot say no to drink nr 2 and all that follows. So thinking that 20 dollar will get you one drink and peace of mind is “stinking thinking” as another forum member here used to say (I do not know who 
).
So when the “stinking thinking” starts you know you have to act on it! Go to an extra meeting, come here to vent, talk about it with a friend who know you try to stay sober, call a sponsor?
Whatever it takes to avoid picking up the first drink and all that follows.
I know there is also medication your doctor can subscribe that can help you with cravings?
Just a thought, but no experience with it. Maybe other forum members know about them. I know Antabuse is one of them.
Good that you are here Sarath. Next time you hear that voice telling you you can buy just one curse that voice and get to a meeting ore here.
Drinking and using only makes things worse 
Ps don’t feel sorry for me about your relapse. There is no need to. You are here for you 
Update: have you checked this thread out yet?
Maybe you read something you can use yourself.