If you're sure these feelings/experiences are impacting your ability to function, I think you should work with a therapist on finding the root of the problem (sleep problems? overworked? just bored? worsening depression? past trauma?)

I deal with this feeling a lot. I have a dissociative disorder. Not feeling "real" can cut right to the core of your identity and your ability to feel comfortable in any and all situations.

I certainly hope that's not happening to you, though. I hope that it's a much smaller problem that hasn't been noticed yet. I hope that you can find support from your friends and family as you deal with this troubling experience. Being around good people who appreciate you can help you find yourself again. I'm sure you're in a lot of pain. I hope that some of this made sense, and I wish for only the best for you.