Can you stall at 3 weeks what should I do did not expect this I feel like a failure . I lost 29 since preop and 12 since surgery now nothing in a week and a half what to do help!

Try searching "3 week stall" on here... literally hundreds of posts about the same thing you're going through. It's not only common, but I think maybe even necessary for a lot of people, to give the body time to catch up to the changes. The bad news seems to be that the dreaded 3 week stall can last several days or even weeks. Skipping daily weigh ins and reading about others going through the same thing seems to be the best advice I found. Just keep following your plan and stay positive...it will pass. Good luck!

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This is perfectly normal, you will encounter many stalls during your journey, but do not get discouraged. Of course I say that after I kicked my scale across the bathroom this morning. Seriously though, don't let the frustration get you down.