Prozac and Insomnia

I just started Prozac four days ago.  20 mg in the morning.

I'm having severe, severe insomnia at night.  I wake at all hours after very short bits of sleep, then I can't get back to sleep.  I wake up hot, sweaty, fidgety and a bit anxious.

Is this temporary?  Will my body adjust?

[sleepwanted]

I had sleeping problems to begin with I am on Prozac, welbutrin and trazodone for sleep. I also sweat profusly. Becareful they dont try to give you too much they started me off with 20 mg then up'ed it so quickly I was unable to function, I now take 40 mg and that is more than enough and Im 5'4 127 pounds.