Can someone please help me!?

Can someone please help me! i have never felt more desperate in my life! i am 18yrs old 5'7 and i weigh 273lbs. I had a baby a year ago and i gained 65 lbs. I have no money for a gym or etc. I feel ugly, fat, and like i dont deserve anything. My wight is even ruining my marriage. Not because my husband doesnt love me. He is actually very supportive but i am always in a bad mood or depressed. Plisssssssss can someone help me lose weight. I live in lake county il.