Naps are good for your brain
I am 3 years post and when some situation requires more energy of me than my body and brain can handle now, naps are another preventative strategy for me. I can tell when I've reached this point, because I'm too foggy to do anything that requires me to think.
During these times, I may nap everyday for at least an hour and when it's really bad a few hours. For example, my class for this semester is longer than I am used to and takes place twice a week instead of once. I've napped everyday and plan on sleeping a lot today!
Just listen to your body. It heals best when you are sleeping. Are you setting an alarm to wake up from your nap? (I've found that if I do this, I don't get really restorative sleep. I do best when I can just sleep until I wake up, provided I don't have anything I have to do or anywhere to be).
Sorry your headaches are bad this week. Has the weather changed where you are at? Ours is been very humid and unstable so I've had some bad ones recently too. (but it could be the change in schedule as well)