It's not surprising if you're feeling additional temptation. When stressed, we tend to return to those habits that soothed us in the past—even when we know they're wrong or the eventual toll they took was high.
You may need ongoing reminders, encouragement, and accountability right now to get through this tough time porn-free.
And remember, if you flub up, it's not over! One primary difference between the apostles Judas and Peter is that Peter didn't give up. When he got something really wrong, he confessed his sin, asked God to strengthen him, and got back on track. You can too.