Ok, reality check...
Me: B- in freshman biology
You: B- in orgo
My bioclass was a 4 credit class, I'm sure orgo is 3 for you (if lab isn't incorporated). I survived, and recovered my GPA, so can you. A B- is not a horrendous deal that anyone should "slit their wrists over" in the eyes of one of my professors 😉. You'll be fine, and you have Orgo two to prove you can handle the material. Work at it, do more practice problems to get rid of anxiety.