Look at your weekly schedule and identify the times available for working on your major assignments and essays. If there are no times remaining for these, you will have to consider whether you are overcommitted and need to limit the time associated with some of your activities, or possibly withdraw from one or two altogether.
While some students are able to work at a steady pace throughout the term, most students find that they work to deadlines. They increase the amount of time spent on essays as the submission deadlines approach. If you work in this manner, then you must make sure that you have a good deal of flexible time in your schedule. Identify what part of your schedule can realistically be changed in times of high demand.