A little worried especially since classes start Aug25th

Ok...well I babysit (at least 6 to 7 nieces and nephews almost everyday except some weekends) And I know I will have a full online class schedule. I'm trying to fit in a regular workout, jumble my life, and help my sisters out. My goal is to lose the 21 pounds and ill be at my midpoint goal to eventually fit into a Halloween costume for the first time. The down point is I slip up once or twice a day and have a small package of snacks that we brought for the kids (no we do not overload them with sugar or salty food and snacks) I've been doing and not overeating or getting emotional. I'm just worried I'm gonna slip up and my confidence of wanting to wanting to feel pretty in a costume. Not have some guy tell me why don't you wear a donkey suit if you want to dress up...thats the very fear I dread since last year :(.