OP - I'm with you! Back again!
Life throws hurdles all the time! I had one thrown my way in June. I was down 89 lbs. I gained some back but I refuse to abandon this. We are all gonna have crap days/weeks/months. You only fail if you don't get back up!
Right now my weight loss is at 76 lbs. It was an even smaller number a few weeks ago. Eek!
Maybe you can have a talk with your parents about positive and negative support? That when they scold you for eating it makes you feel bad and then offer ways they can support you: stocking the house with good foods, eating their cupcakes outside the house, etc. Sometimes people just don't get it. Motivation doesn't work the same way with everyone.
Good luck!