Feel so dead today - is it hormones?

I was totally wiped out by 9pm last evening and I still feel like a total slug today. I also have one of those monstrous headaches. I've been getting them pretty much every day for the last fortnight and am popping paracetamol with alarming regularity. I guess it's hormones - dropping back on the night feeds and supplementing other daytime feeds with solids is bound to have an effect, which reminds me that the dreaded period is going to reappear one day, I just hope its not soon.