I don't know what to do:(

I've tried everything. And I cant seem to lose any weight. My doctor is expecting me to have lost weight when I go back in July. I'm depressed and I really hate myself with how I look. My clothes don't fit and I don't want to buy anymore since I'm trying to lose weight. I wear legging a and tshirts or sweat pants & it's almost summer time. I'm so unhappy. I have no energy, I hate letting my husband see me naked, my body hurts 24.7. I get out of breath going up 12 stairs and I'm 50 pounds overweight. I'm thinking about just eating one meal a day and drinking meal replacement shakes 2x a day. or just starve.