[Sukadrukanga]

Its OK to move a bit but for most people it tends to disrupt the trance. If you are uncomfortable and not fully trancing already then there is nothing to lose. With LOTS of experience, even getting up and moving to the next room is possible.

In general, if repeated movements are required then you should try to change your environment to avoid having to do this (includes tipping head to swallow). Note that beginners make numerous (non-repeating) tiny adjustments which indicates more practice is required.