entering the tunnel

Ok, so imagine that you're in your car. You are just driving along on a beautiful sunny day. Up ahead is a tunnel or an overpass. Naturally the tunnel is dark and as you drive into it it takes a second for your eyes to adjust to the drastic difference in light. If you are like me, this freaks you out for a second because you can't see a darn thing when you are crossing into the tunnel.
I feel like this is my life right now. I was well adjusted to life as a college student, but tomorrow I will start my life as a full time employee and I am so freaked out!