Problem after transplant

ok this is my first grow.Yesterday a transplanted my little 2 day old babys and now there thriveing and doing great.BUT today i transplanted my 4 day old and go out to work.come back and the middle of the stem is all shrunk and brown now the plant is drooping over.Is there any thing i can do to fix this? ill post pics soon but my camra died.Any help is great thanks.

its either fungus which i doubt on a 4 day old plant or you either broke the main tap root or pinched the stem when xplanting. or something inside your new soil/containers killed it most likely soap residue from not rinsing the new containers well enough after sterilizing

yea i think i pinched a little bit of the main root off i put it inside a modified straw to hold it straight up do you think the roots and stem will recover because i have 2 other healthy plants but i wanna know if its pretty much gone or if it will make it.

it should spring back up long as the plant didnt get an air emblisim when the root broke its probly just a bad case of xplant shock worse for worse its only 4 days old not abig loss