FL score drop 2 weeks out

took 3 full lengths and got a 460 AA on all three, but my chem/orgo were like 470-530, and it was really my bio 410-430 that was keeping me plateaued at 460. i spent the past week really just focusing on bio, and took a fl yesterday and got a 430 AA with bio at 470 and everything else dropping. i feel really disheartened especially because my exam is two weeks out and i wanted to move up from 460 not go backwards. has anyone else experienced a drop? part of me thinks it's burnout bc i made silly mistakes in gen chem but it's really frustrating