I am a junior and need to raise my GPA fast!!

Hi guys, I find this completely embarrassing, but I have an unweighted GPA of 2.421. I am not completely slacking, however. I am in the Cambridge International Examinations program and take honor classes if no CIE version is available and I work hard to improve myself. I’ll be honest, my grades have not been the best and I failed Algebra 2, math is simply not my subject. I am wondering if there’s anything I can do to quickly pull it to a 2.5 or if possible, a 3.0?