Fallen back into old habits

I'm four weeks into this particular weight loss journey and I'm down 16lbs so far. I really need this to stick, I want to make new habits and live a healthy lifestyle. I thought I was doing so well with building habits that I could stick to even when I was tired or short on time. I've managed to stay on track even when everyone else I'm with has been indulging.

But this weekend, Easter coupled with a few emotionally difficult situations and I've fallen back into old unhealthy habits. I am getting back on track and I won't let it stop me. But I really need some reassurance that I will get to a place eventually where these things don't throw me off. At the moment I can't see a future where I don't revert back to bad choices when things get tough. I've never managed to keep weight off before even though I've been successful in losing it. I really need this time to be different.