Concerned New Mommy To Be

I'm 14weeks and 3 days and I become restless every now and then, I don't know how to handle this cause I have work, and I'm living with my boyfriend and his son who's 9 I have constant chores and lately I can't cope I'm forever sleepy, got a warning from work cause I'm not delivering my work properly. My school work is suffering I'm failing. What can I use to focus and boost my energy