Your goal is to get the highest grades possible to raise your GPA and leave probation behind you. That is your overall objective and you should choose classes accordingly. Reduce the number of credit hours you are taking for the semester. Check with your Financial Aid advisor for any penalties below 12 units. Enroll in classes that you know you can do well.
Every student has areas of strength.
Small doses of knowledge are easier to take than one long session. Take a HARD look at your overall use of time. There are only 168 hours per week, and classes, studying, and other activities can use up great amounts of time in a hurry. Reduce your hours at work if you can. Banish all outside activity until after the next semester.