Low self confidence 😢

Hey ladies. I'm hoping someone can help me out here. I have had very low self confidence here lately since I've gained weight and I feel like it is taking a toll on my marriage. I feel as if my husband is not longer attracted to me ( he says he is) but I make my self believe this because I hate the way I look. When I walk in the room I compare myself to every other girl in the room until I'm upset with the way I look. Has anyone been through this and got through it?! If you work out what keeps you motivated. And how can I change the way I feel about my self. Any advice is greatly appreciated. Love you ladies!