Having second thoughts

Hi! I am 30F 5'5" and 240lbs.

I was recently approved for gastric sleeve surgery and am scheduled for February 17th. I am feeling really nervous and maybe I shouldn't do it. On paper, I am healthy. I have PCOS and Hashimoto's. I also found out I have a fatty liver (through testing for the surgery). I want to lose weight and be a better, more active mom and to just feel better about myself in general. My husband and both of my parents think I shouldn't do it and I'm starting to agree. I worry that I won't be able to stick with all of the rules afterward and that I'm messing my body up even more. Since I'm "healthy" I worry that im taking on more risks than necessary. Maybe I should try really hard to naturally lose weight first. I have tried lots of diets before but I never stick with them. Idk, I just feel scared and have lost the enthusiasm I had. I've never had surgery before and this is a little bit more than I initially expected. I guess I'm just looking for some advice or a sign. Sorry for the rant.