I totally understand your vent. Yes, you are intitled to vent!
I experienced this also with someone and I had to reply to stop with the negativity. I don't want to hear horror stories, I want someone to say "Good for you, you are finally doing something for yourself". For many years I catered to others, was concerned about what others thought. Even my career I have to put others first- that is the healthcare profession. I cannot afford to have another year of living worrying about others. I have taken the bull by the horns and have booked my surgery for next month and I am excited to start MY life!
Best of luck to you. Remember, it is fine to choose to do something for yourself! Your child WILL benefit from you being a healthier role model.