I take Allegra occassionally, and have taken it both at night and in the morning. I haven't noticed any extreme symptoms like you have described. I do on occassion have crazy dreams, but I've always attributed them to stress and never tried correlating them with medications. However, I'm a pretty good sleeper and even when I was taking antimalarial medication that specifically lists weird dreams as a side effect I didn't have weird dreams. Actually, it seemed to stop the weird dreams...
So anyway, no I don't experience those symptoms, but I'm just one unique individual. Did you read the patient info? Usually that lists possible side effects. You could call and ask the doctor, too. Good luck.