Hi there ~
I understand your concerns and that you have had recent surgeries and have been healing from the same. The hormones could be contributing to the weight gain. There are two ways to lose weight:
1. Eat right - and healthy. Which might mean that you need to consult a nutritionist.
2. Exercise regularly - 4 times a week for 30-40 min per session and it should include both cardio and weights.
You may also want to see a psychiatrist
to help with the anxiety
about losing weight. I hope you get yourself on the track to recovery and a healthy weight as soon as you can. I hope this helped.
Take care and have a lovely day!