Help!!!

Seti
So I just finished my junior of high school. As you all know junior year is the hardest. Are started my high school career with a 3.98 GPA and I started this year with a 3.8, 9 months later it's a 3.3 😪 . I take IB and classes at my community college which are the sole reason for this drastic drop but I can't afford to drop them. Do you guys have any ideas on how can try and bring them his up to at least 3.5 ?