Want to lose weight so bad but just keep eating sweets and junk food

I'm 33 years old and 9 months PP before I got pregnant with my daughter I was already heavy at 210 lb mind you I'm 5 7 and 1/2 I am now working close to 270 lb and I'm so miserable but do not know how to change my eating habits I find myself going to sweets before anyting and every month I tell myself you're not going to grab sweets this month and still I do I do not know how to stop eating sweets they are my worst failure when it comes to my eating habit I want to be healthy for my daughter I want to be healthy for my husband we are both overweight and struggling I have no motivation to go with him on little walks or anyting I sit home all day miserable please if you have any advice on the first steps to take on the healthy things to eat and on the way to cut out sugars I am here to listen please help. BEFORE PREGNANCY

AFTER😖

Please any encouragement anything that help knock you out of what you were stuck in when you couldn't lose weight would be so much help God bless also before I go I am still breastfeeding my 9 month old so I am unable to take any kind of supplements