Day 2 of yoga flow 30 day programme

This morning I completed day two of this free programme on Youtube - Yoga with Adriene. I'm feeling fairly stiff and creaky after two weeks of little exercise!  Hopefully, this will help. I spent most of the afternoon on my least favourite of activities - ironing - and I've now developed an absolutely thumping headache. I'm wondering if it's sugar withdrawal given that today is the first day in ten days that I haven't had some kind of  sweet treat, or if it's the prospect of going back to work on Monday looming large!