Don't know the extent of your "relapse"; but, if I were you, I'd just be so grateful to be back, I wouldn't question it...not everyone makes it back, as you well know!
Whatever you did before to get/stay clean and sober, double time it...think recovery, recovery, recovery...you don't have to keep "testing the waters" to reinforce the fact that you're not going to get any better at it. Embrace the fact that you've been given another chance...for all you know, it could be your last chance...don't throw it away.