It very well could be overtraining. I'd say normally that if your workouts were similar as they've been in the past(without past problems), and you calorie intake is sufficient, then just the addedbstressbon your body could be pushing it last that limit it can take, and you are overtraining... If you have insurance and a doc, you can find out within the day, whether you are or not.. have your doc order a cmp(complete metabolic panel), get your blood drawn, and by the end of the day you should have results. You want to look at CPK levels, if they are over the high normal range then you are overtraining... From sounds of it that's the case, but that bloodwork will tell you for sure!!!