If I could go back in time and give myself one piece of academic or professional advice, I would say don't be afraid to ask questions!! I learned that the hard way as I silently struggled in some of my classes and didn't know what to do. I didn't want to raise my hand in class, and then I thought asking questions wouldn't make me look as smart as the other students so I stayed quiet. As time went on I realized that is NOT the way to go and now encourage students to ask questions whenever they arise. Maybe you're not comfortable asking in class, but be sure to get clarification before the day is over from a teacher, fellow student or tutor; otherwise it will just get worse. Nowadays I ask questions all the time :) There's no good that comes out of suffering in silence.