I don't know if I am going to take my dose today, I just don't feel right.
It is going to take some time for the prozac to start working. That spacy feeling is actually quite normal, think of it as the medication at work, with time it will go away. And your appetite will return. Some people such as I, had to try different antidepressants until I found the right one for me. But with each one the spacy feeling was there for at least the first couple weeks.
Hang in there, and Good Luck