that is absolutely nothing to worry about, but i can certainly understand your concern! i accidentally snapped a 6 week flowering plant at one of the 4 main nodes which were flowering, that bitch snapped almost clean off! it was hanging off with the whole weight of the bud above it, (about the size of a coke can at the time), but i immediately pulled it back into place, cellotaped it up, and it didn't miss a beat! i may have some pictures to show you but you cant see the split! anyway that was 2 weeks ago now and its grown just the same as the other nodes.
BbblZ