Tired

I had a great visit in Cheonan and then this afternoon decided to take the bus home instead of train as I have a long trek back to my apartment from KTX station and thought the bus might get me closer. Also the bus ticket was half the price of a KTX ticket.
The bus ride was quick and only took about an hour but when we arrived in Daejeon-we were in an area I did not know and not where I thought it would end up.
I thought we would be close to the metro but we were probably 20 minutes or more walk away from the subway. I literally had no idea where I was and decided to get a cab as there were a ton outside bus terminal. I got in the cab and said Chungham University chuseyo and soon realized the area where the bus stopped was a long way from my apartment-probably about 30 minutes.
When I got to my apartment my door would not open and the lights on the keypad did not even come on.
I went downstairs to see if the matience man was there and he was not. So I called my boss and it took me awhile to get a hold of her. She called a locksmith and called me back and said he would be there soon.
I was sitting outside my apartment door waiting for the locksmith to come when one of my neighbors who is also American and speaks very good Korean came out. He asked what was wrong and I told him. He informed me that on the inside of my door there was a panel I could take off and change the batteries but would have to get in first.
The locksmith then came and used a 9volt battery to get in my door and charged me $2o for that . My neighbor translated for me to the Locksmith which was a big help and showed me how to change the batteries on the lock once I got in which was very helpful.
I feel like such a stupid girl right now. I had no idea that the batteries were on the inside of the door or that I would have to change them.
I assumed that it was taken care of by the matiene man and was on the front of the door. I was wrong. I wished my boss or the other teachers at my school would have told me about this.
I am so tired and worn out and think I will be heading to bed early tonight.
TTFN