If you've got two feet to go, you may not have an issue. I had the same worry a week and a half ago, when my 2.5 footer reached 4.5 feet at 2 weeks of flower.

Luckily, it seems to have stopped at just shy of 4 weeks. Currently the top is 6 inches under the hood glass, and has been there a few days.

Unfortunately it's a strain thing in many cases. So yours could be different.