Help me save this baby orchid please

[Alvaro78]

Hello beautiful people. The other day I was watering like normal my orchids and this one got some water on the crown (happens) and when I went to remove it I was stupid enough to somehow apply enough force to literally snap the new tiny leaf that was growing... Some days later and now the orchid is starting to have a yellowing leaf and I am worried this could now kill my orchid. So I was looking for some advice on how to proceed.

The orchid is potted in a sphagnum, bark and perlite mix, the roots look green and healthy and I fertilize with about 70-100 ppm of N on each watering. I also just applied some Kelpak for some more root growth.

Thanks a lot for reading all this, below I attach a pic of the said orchid