Ok so I heard about taking L-Lysine for herpes, and Echinacea of course for your immune system. Well, I am taking both of these along with prenatal vitamins. (no, I'm not pregnant just taking them so I get enough vitamins) Anyway, since I've started taking all these, I have been so tired. It doesn't matter how much sleep I get I am always tired half way through the day. Is this normal?