You are not restricting yourself by doing those practices. They are the highest practices you can do. Sadly there is no third eye.It was just an experience that took you away somewhere. What Greg has said here is correct. Coming down to the ground is quite difficult but necessary. Ego wants you to fly. This is the problem all genuine practitioners face. So you are not alone. But I think all will be o.k.
So you're suggesting that all my experiences have been my imagination or bouts of psychosis?
Hi Motova, I am not sure what Andrew's view is but in my experience and according to the authentic traditional lineage teachings I have received there is certainly a basis for what you could label the "third eye". However, Greg is right it is not to be dallied with casually on your own... that could create problems. As for your own experiences, it would be best for a teacher to interpret for you. It may have been imagination, or noticing the cellular play of light through the nerves of the visual cortex, etc. Or you may have activated subtle nerves in that center. There is a quite detailed map of the different psychic nervous centers, or "chakras" which are like hubs of these thousands of subtle nerves. They align with the central channel. In sanskrit the channels are Uma Kyangma and Roma. http://www.rigpawiki.org/index.php?title=Subtle_channels
The central and the two side channels. These are related to extensively in the higher yogas, specifically Anu-yoga which works with Tsa lung practices directly. You absolutely need a teacher who has mastered these practices to train you in them.
So maybe what we could do collectively is try to point you towards a teacher.