L-Tryptophan is an amino acid used by your body in healing, rebuilding and building muscles. One of the side effects of ingesting active L-Tryptophan is that you get sleepy. Thus the reason everyone tends to get sleepy after Thanksgiving dinner, turkey contains lots of L-Tryptophan.

But that said, it has to be active to have that affect. Activating it is done by temperature, it has to be warm. Since you're taking it in supplement form, it likely would have little affect on your mood or sleep patterns.

On the other hand, Niacin can cause the puffiness and make you feel flush. I'm guessing that the combination of the amino acids and the niacin likely caused some irritability as your energy level was up (and also the insomnia). The first reaction was probably to the energy being up as well.