biological clock. ALARM CLOCK DAMMIT

I am getting really bad about sleeping until it feels like it is time to wake up. Thank goodness I still have plenty of time (IE: 30 minutes) to get ready for work and allow myself plenty of time (IE: 30 minutes) to get there. Wow. I did good this morning. Even if I did completey screw up and set my alarm clock for 5am when it didn't need to go off until 8am. I still woke up on my own. Does this mean I am getting old because I have a biological alarm clock? Before I know it I am going to have an actual biological clock ticking. Oh God. Oh...God.