The Belly Bulge and Thighs that Rub..Sigh

I'm hoping that this site can help me. I had always been able to suck in my tummy while out during the day. The last few months, I've been drinking sodas instead of wine. I thought that I was doing well. Not! I put on pounds and it's exhausting sucking in the stomach and it doesn't do the trick anymore. My face is fatter, thighs are rubbing together as I walk and there appears to be a double chin. Sighhh.. I'm hoping that by sharing my story that I'll meet Good People so that we'll Encourage one another. I'm in Texas. Thanks in advance.