My children are 3 and 5, so I know it is so hard sometimes. They just don't understand you are doing all this for them, and it makes it really hard to be the adult that has to deal with all the guilt...just remember we ALL feel guilty as mothers for something, it just comes with the job. you will get through this, look back when the schooling is all over with and you'll feel so proud. That day is coming, just keep your chin up.