It doesn't happen too frequently, but I have had the experience where the swallowing reflex seems to have been put on hold for the duration of sitting and I've ended the meditation choking on an enormous mouthful of spittle
The salivation is very common. Try resting the tongue so the tips is against the roof of your mouth near the top of your front teeth. The saliva will naturally drain.
As for the other aches and pains, the expression of your tear ducts - this could be the result of unconscious tensioning and relaxing of the muscles in the head. I would be very surprised that in time it doesn't just dissipate on its own. In the meantime, keep your attention on the meditation object.
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