First of all don't beat yourself up just get back on track I'm 2 years out of gastric sleeve. You never get it right 100% but learn from your mistakes. You want to increase activty so that you feel good after surgery and be able to elminate gas ... and your recovery isn't long ... Secondly you want to start now so that you create a lifestyle change and make good habits. I have the same feelings since surgery and even now but don't let it scare you make positive changes encourage yourself if you have to ...don't stop keep working towards your goal ...