What do i do

so I had my exam on 24s1. im sure I fucked up big time didn't go as planned i had prepared decently well but goddamn the calculation and lengthy questions I fucked up. I have boards in 15 days (HSC) what do i do? I need to score well in april. should I manage jee and boards prep simultaneously and during Feb-march I plan on doing jee pyqs as well as i give my boards. im just desperate to score good marks in april. would i make a mistake and end up ruining my boards?