WHAT SHOULD I DO?? IM FAILING THE ONE CLASS I NEED TO GRADUATE COLLEGE?

okay so this entire school year has been very stressful, im not going to into details. alot went on in my personal life and with academic performance. The beginning of the school year i attempted to take my last natural science class...i need two to graduate. i was failling it so i dropped it and postponed it until the summer. so anyway i graduated in may...well walked in may but i had to go to summer school to take a natural science in order to get my degree. so anyway it cost me over 4 grand to go to summer school all for this one class, and im still failing!. i study non stop, i have study groups, i stay after class to get extra help and its not workimg, i dont know what to do anymore. this one class is holding me back from graduating and moving on with my life :(