Fitness is frustrating...

So, this Fall I committed to working out. Oliver is in school full days and it is much easier to leave one child in babysitting plus Gibson is usually pretty easy going about those things. As well, with Oliver in full days I didn't have to worry about being home for the bus and all that. No excuses. So I have been booking Gibson in for babysitting 3X a week and I go to a drop in class at the YMCA. I also try to use the Treadmill at home on my "days off". I feel stronger, however, I am gaining weight! I don't think I am eating more. I have also started a "don't eat after 8:15 p.m." rule which has cut out a lot of extra calories. I have to believe it is muscle because it is annoying! The other annoying thing is that Gibson has started being really fussy about going to babysitting. I know he is doing it to see what he can control, but my "easy" kid is starting to get challenging and I don't need that! Arghhhh!