i need advice please

After I gave birth to my daughter my depression triggered far worse than before and got out in Zoloft and Monday got it switched to another medication..that's part of my issue my dr recommended me to starts exercising eating healthy and trust me I have been trying but I'll just lose a pound or two can't really say I over eat cause some days I just don't get hungry. I was weighing 210 now I weigh 246 😔 I think me getting obese has also caused my depression. So I'm considering doing the gastric bypas but I'm scared and don't know what to really do. I don't have family to help but I also want to be healthy for my kids..any suggestions opinions or thoughts are gladly welcomed..