Two thoughts:
For some people it seems like too high dosages (or K2) start impacting sleep negatively (see eg @John_Hemming prior comments and I think his blog post).
You can easily test your overall K vitamin levels via blood test. I haven’t seen a K2 (or K1 or subset of K2 test), but that would be very valuable, so please shout out if you see anything on that and it could help us calibrate right dosages