"isn't this resolved by opening the lower chakras to balance it out?"

Yes. Sometimes I smack myself in the forehead, but this can have negative social implications.

"Ok, now, about a month ago, usually the only times I'd feel the sensations of the Third Eye would be either during the Star Ruby (ΣΟΙ), or during an intentional meditation on the Third Eye.

A couple weeks later, I'd feel my Third Eye for atleast 10-15 minutes after getting into bed (every single night),

Now, it seems like whenever my head doesn't move for more than 10 seconds, I'll feel it, nonstop (I'm feeling it now, actually).

Is this supposed to mean something? Should I do something? I mean, it's great having a mystical experience 24/7, but seriously, what gives.

(Oh, and I should point out that I opened my Third Eye about 7 years ago, so this feeling isn't anything new)"

I have the very same sensation at times. It lasts an indeterminate amount of time, from several minutes to hours. It is indeed related to third-eye activity. It occurs to me most particularly during Meditation/Asana. You simply have a very sensitive third-eye chakra. With practice you can learn to control it to a greater extent. I would say there's nothing to worry about at the moment. For me it was annoying at times, like growing pains.

Third Eye activity, right before going to sleep, usually ended up in spontaneous astral projection
Or, once some control had been established, lucid dreams :
Have you noticed any difference in your dreams?