Please help

I’m 200 pounds and want to lose weight like 60pounds and get a time stomach. In high school I was really fit I had a nice body flat stomach that was tone a nice butt the whole thing. That’s when my husband and I met when I had that nice body now I’ve gained weight a lot of weight and am trying to lose it I eat healthy work out twice a day 4 times a week but just can’t lose the weight. I was to be able to wear a bikini and love how I look. I have stretch marks to I want to get rid of. I’ve never been pregnant. I have very little upper body strength. My husband is in the army and I’ve tried doing pt with him but I just fail I need help please. Someone help