What's wrong with me?

I've been having an extreme loss of appetite.. I mean to where I havn't eaten anything but 3 pieces of pizza in 2 days. I can't even stand to eat. I'm too full. I'm already severely underweight and it's causing me to lose weight. What might have caused this?What's wrong with me?
I am sorry, you need to see a doctor, immediately. I have to go and see mine soon. I am feeling extremely fatigued myself.

I missed three days of karate. I took my kids but I just sat and watched them. Their sensei is hot.What's wrong with me?
Sounds like depression or stress, which can either make you over eat or cause a complete loss of appetite! Or you could just be coming down with something. Either way visit your doctor asap for a check up and express your concerns. Good luck.