2 month weight loss?

I was 170lbs last winter and got down to 150 by spring and 135 by summer. I recently went back up to 150 (I maybe 145 idk cause I haven't checked in a min and I've been walking and eating less) I want to get back to 135 or lower in 2 months. I eat about 500-700 calories a day. I don't have a car so I walk everywhere quite often and I'm going to start working out everyday starting this Monday. I seen where someone just ate rice and eggs everyday should I try that? Or does anyone have any other advice???