We figured it was too much caffine and nicotine. This happened to me once before, many years ago, and it was very simular.
Only, I hadn't had any more caffine and nicotine in larger doses than normal for me.
The only difference in yesterday than in the past few weeks, is MIL got back from pakistan.
Connection? Well, I woke up feeling fine. 2 cups of coffee and 2 cigs (my normal morning consumption) and 3 visits from MIL into my room with ... loud conversation, and my heart is back to irrigular heart beat.