Do you want to try using a Time Map to get control of your time? You may have heard about it before. Julie Morgenstern wrote about it in her book "Time Management from the Inside Ou"t. What you do is make up a schedule sheet with Sunday through Saturday at the top and times by half hours down the side. ie.
Sun Mon Tues Wed Thurs Fri Sat
6:00
6:30
7:00
7:30

First plug in work, meals, classes and appointments.
For the rest of the schedule you can use basic categories, not necessarily specific activities.
Add self time-you should have at least 1/2 hour a day to yourself so you don't go cuckoo.
Now add family time and study time.
Then you can add errand time, home time (cleaning and decluttering), morning and evening routine and any other categories you need.

Time maps allow you to be realistic in what you can fit in a day. It will also allow you to plug up those time holes where you know you were doing something, but can't even remember what it was.You can write your time map in pencil because it is an evolving schedule. You will find you can't always follow it, or the schedule you wrote doesn't work. You can keep changing it around till it does work.