So, I actually just gave a presentation yesterday about how I was feeling fine even though it had been two days since I had Pepsi. But today is a new day... And today the groginess has set in. Though as of yet im happy to report that I have no headache to speak of. Im not really sure how to describe what im feeling though, its like it takes my brain several times to understand things that should only take once. It is very unhelpful in classes that require a great amount of concentration. Wish me LUCK!