It certainly is difficult to find time for yourself if you have a lot on your plate. What I would recommend to keep stress levels low is make daily To- Do Lists to ensure you are accomplishing the small set goals.
Try to ensure you are eating and sleeping well. Along with keeping focus with task lists, daily reminders, set time frames for big projects to make sure you allocate sufficient time so you don't feel overwhelmed. From personal experience, I would suggest to make it a point to schedule time for yourself. Maybe you have a spare hour to go for a walk, or go treat yourself to lunch or a movie. You have to commit to yourself that after working so hard all week with your responsibilities, that you do take some dedicated time for yourself.