Don't worry.
You did the right thing by taping it up. Some pictures would help the jugdement.
Keep an eye out for any infections or mold, where it was split.
Remember, this could potientially make the plant even stronger. It happens sometime if you use HST, and the approach to fixing is the same as you did.
It actually happened on my recent grow and it got much stronger at that place and developed stronger stem.
Good luck and no worries :)