Ok, yesterday I asked a question, and I now have a update. Please read...?

I am 19 years old. A year ago my Dad co-signed a student loan 4 me, totaling 18,000. I used 2500.00 of it on school ( a vocational school for phlebotomy) I blew the rest of it (yes, 15,500) on shopping & stuff like that wit my ex bf. I then told my dad i enrolled in Phlebotomy #2 and it cost me 12,000. therefore, no more money (in my dads eyes) but in reality i wasn't even going to phlebotomy #2. It doesn't even exist. So today, my dad called the school & found out. He called my work and asked me, If i am really going to school and i yes! then he told me he called and blah blah blah. He told me to go over to the house today after work so we can talk.(he sounds pissed and im scared) I am also 4 months pregnant which he doesn't know about. There is no possible way i can face him. I am ashamed and embarred. I'm thinking about just writing him a letter confessing everything. what do you thi