Jesus Christ............It's NOT damn ROcket Science............it's a frigging weed bro................about impossible to kill one...........your close.............lol.........
You can save it easily...............prepare another pot, even use FFOF if you want. Squeeze the sides of it's pot real well to break the dirt loose............
Hand over the plant and soil, flip the pot over, squeeze the pot until the whole dirt/root ball comes out in your hand.
Have a big pot of WARM............you know warm, NOT cold, NOT hot........WARM...............water handy. GENTLY put the dirt/roots into the water
and slowly break away all the dirt. Do it slow n gentle, simple to do. You MAY touch and rub the roots, just be careful, they are fragile. Get all the dirt off
the roots..............pop it up in down in the water, (only the roots, plant NEVER in the water) letting the roots float n sway in the warm water washing them clean...
Transplant into your fresh soil( NO NUTES) and give it a SMALL hit of filtered PH correct water. Put it in 75-80 % light area...........2 days it's fine.
BTW...................do I think it will work...............YES............EVERY time I come from seed I start in dirt............Dixie cups............then 10-14 days later,
into the 'dro.................NEVER lost one due to handling roots or transplanting................roots will be FINE even with you rubbing on them, the light hitting them
and the shock of new home. You would not believe how well I soak the roots BEFORE putting ANYTHING into my 'dro systems. NO WAY having any dirt
or foreign matter in the system. The lil suckers are TOUGH.................take the 10 minutes to go do this............then chill out.............all will be just fine.
P.S. DO NOT mist the plant.........................
Good luck to your little plant......................