Without going into too much detail I suffered some head trauma a few months back which may have led to PCS.

One of the symptoms I've noticed is Post Exercise Malaise, or even feeling fatigued/very fluey during exercise and unable to train at the intensity I am used to. I have no idea if it is CFS, but I am definitely guilty of over-training in the gym and really pushed my body in May/June 2015, including hard exercise before breakfast. I'm just wondering if this time I have pushed myself too far and ended up in CFS territory? Or is this low energy state a symptom of PCS

I also experience occasional night sweats and have been suffering from a low-level chronic flu/cold type illness for the past 2-3 weeks which has been difficult to shift. I've had most blood tests under the sun recently for different reasons. GP is fully aware of my concerns and wants to monitor.

Does anyone have any similar stories of CFS/Fibro being brought on by excessive exercise with insufficient calorie intake? Or whether a head injury could trigger CFS?