Weightwatchers & Losing Weight. Help?

I did Weightwatchers before and lost some weight, It's only when I stopped going that I started going off the rails. E.g. at Weightwatchers I would see a somewhat normal weightloss per week, but once I stopped going I could lose up to 10lbs per week then binge entirely for the whole week after then another 10lbs off. I know this isn't healthy, but this is the way my mind thinks now. I only left Weightwatchers because I felt pressure to lose weight in a short time frame. I find it extremely difficult to accept that I am on a progressive journey as I am in the acting industry and I have to be thin to get a job. I left Weightwatchers because I was told I was too fat for a role so I lost weight and made myself ill just to get it.

The question is - Can I actually lose weight myself without going back to Weightwatchers? I don't know if I trust my mind to go it alone, but I'm not entirely sure if I want to go back to Weightwatchers...