Oh how I wished to have been in to Zumba during my pregnancies...it is such an awesome workout. But I did run throughout my pregnancies and worked out. I
I see 2 pregnant women Zumba at the classes I go and a couple of gray haired cute ladies. The ladies that are prego just take it a little slower and don't do the high energy jumps or other movements. THey keep it lower impact. I am not sure if they asked their doctors...but one is a nurse and very careful to follow "the rules".
I am not sure what a doctor will say to an overweight woman wanting just now to start a new routine...and that you have had ab surgery. If I were in your boat I would wait til the appt. and get an opinion. In the meantime go for a long brisk walk a few times each week to get your body movin and groovin...and then you might get the green flag to go shake your booty and you will have had some good exercise already.
I absolutely love Zumba!! I love the energy in the room with the other ladies and the total body workout. I find myself shaking my hips throughout the day when I vacuum or do some other boring activity. If your doctor tells you "No" then find something else in the meantime until post pregnancy. Then take it up...I am serious about how fun it is..and it trims you down all over...especially the core. You need to find something fun to work on your weight...excercise should not be a chore.
Good luck and best wishes..and congratulations on the pregnancy!!