Body image in pregnancy

Pre-pregnancy I was at my goal weight and worked hard to maintain it. Ever since I found out I was pregnant, I’ve adjusted my workouts and my thoughts about my body as I’ve gained weight. My intentional thought is “This is my body now, and I love that it’s carrying life.” Within the past couple of months my husband disclosed a sexual affair that was ongoing for 1.5 years. I’ve since struggled with my body image and feel like my body is more undesirable and different (in a bad way) now that I’m pregnant. My husband loves my pregnant body, but all my insecurities about how I look are surfacing again. I can think, “This is my body and it’s carrying life” but I feel resentful. I don’t even know where to start self-coaching and have largely avoided thinking about my body.