I would just like to say reading the above has got to be a decision you make , you may find it helpfull to try breaking your study up with quality time doing somthing you enjoy, it may be you are trying to do to much and i have found by giving your self a break and going back to reading chapters it helps to obsorbe the information we are reading, also by going over the chapters a few times, good luck and give your self credit in being determined to complete your courses but also tacking part in doing them