Hi everyone! I am new to this group and was hoping to reach

Hi everyone! I am new to this group and was hoping to reach out to get some support! About 1.5 years ago I lost a lot of weight and was so happy and proud of myself. Now 1.5-2 years later here I am and have gained it all and then some back. I am so mad at myself! I am at the heaviest I have ever been.
I joined the gym again for group fitness training and started their meal plan again this week. I'm struggling though, not so much with the meal plan because it's a lot of food so I'm not hungry. More so with going to the workout classes. I've been having small panic attacks before going to them and while I am there I am noticing that I am feeling better while working out, but while I am waiting to start I feel like I am ready to pass out. I think it's because of how shameful I feel since it's the same place I lost the weight to begin with. I feel like I let everyone down. I am going to keep going, I need to for my health. It's so difficult emotionally though and these thoughts of being a failure keep coming up. What do I do?