At My Wits End

Hi y'all. I've run with MFP before but never really used it for anything else, so I'm ready to try! I'm kinda going crazy and would love some feedback. I'm 5 feet and have been small for most of my life (98-108 lbs). I'm 28 now and over the last 5 or so years I've gained weight. Around that time, though, I went on some medication for anxiety that basically took away my appetite and I lost a ton of weight. Now I'm back up. I weigh 120. For the past two weeks I've been working really hard without being ridiculous. Lots of fruits and veggies, lean proteins, and usually a serving or two of quinoa or black beans. I've cut back on alcohol and don't drink much at all now. I've been eating smaller portions and even finished my lunch for dinner! (It was chicken and quinoa). I've started running again, doing C25K three times a week. Soooo....after all this hard work, THE SCALE DIDN'T BUDGE. I lost not one ounce, but I didn't gain anything either. I thought that going from eating a whole pizza in one sitting to doing what I'm doing with only a few minor hiccups (3 glass of champagne when I got engaged this week and some chips and dip on Saturday) I would at least lose a little. I normally lose pretty quickly. Any thoughts or help? I'm sure I just need to be patient, but should I keep doing what I'm doing or try something new?