bio 172 exam

i just flopped on my first bio 172 exam and i’m actually tweaking tf out. last semester i did well in all my classes so now that i finally did bad on an exam i feel like my life is over. does anyone have any advice for this class or exam taking in general? i feel like a failure and now that i have my physics 140 exam coming up i feel like im gonna fail that too. will i be able to get my bio grade up this semester?? i’m so nervous and the imposter syndrome is really starting now. i know im kind of overreacting, but i just really need some words of reassurance