I agree with Hanna and you as to the importance of cleansing from below with enemas, Colemas, and colonics while following a cleansing program. I consider them to be essential!
I think after experiencing the relief a good enema can offer during a cleanse like this, you will find yourself looking forward to them. Goodbye headache for sure.
I've found that when I've had a headache and given myself an enema that often it disappeared without me even realizing it. I just remembered afterward that I had a headache at the start and didn't now after it was over.