Everyone experiences difficulties with studying at one time or another, and overcoming these challenges is all part of the learning process, particularly when you have a large workload.
There are no shortcuts to any place worth going. – Beverly Sills.
Such issues range from temporary glitches to chronic lack of motivation and low productivity. It can take what feels like extraordinary will-power to overcome these issues, but the important thing to remember is that they can be conquered with the right attitude.