Got married and let myself go!

I've been married for a year and gained 25 lbs! I didn't mean to let myself go after getting married but I did! I went from 130 to 155. None of my clothes fit me, my self confidence is really low. Sometimes I don't want to go to certain places in fear that might run into someone I know. Now I'm ttc and I know it's just going to make it worst. I want to be a mother more than anything though! I eat when I'm stressed and ttc has been stressful. I sit at a desk all day working 8-5 5 days a week so I hardly get any exercise. Any suggestions on what I can do?? I'm trying to eat better and drink lots of water.