Serious withdrawal

Do you think that I could be having withdrawal from Diet Coke? My "life coach" (and I, in theory) decided that I should just give up soda cold turkey this week (I, of course, had to agree to do it, but I didn't want her to think that I was weak or unwilling to try!) It has NOT, contrary to what people seem to think, made me feel better. In fact, I think it has made me feel worse. My head has been hurting and I'm just generally feeling yucky. I am also about to die to have a Coke. Let's face it, I'll probably go ahead and have one before I go back to her next week. It will still be a serious soda reduction.

My exercise has also been upped this week to 4 times a week, 1-3o minute session, 2-40 minute session, and 1 - HOUR AND TEN MINUTE session. Now, that long one I spend 45 minutes in my "light" heart rate zone and 25 minutes in my "moderate" so it's not really hard. But it is booooooring. And I basically have to do it on the treadmill because otherwise it's pretty hard to keep my heart rate down in that zone. And I feel bad taking the treadmill at the gym for that long. On the subject of exercise, I would like to add that it also does not make me feel better like it is supposed to. It makes me feel better in a "I-checked-something-off-my-list-for-today" kind of way, but not in a "I-have-more-energy-and-feel-healthier" kind of way.