headaches

Hi all. Glad this group exists. I'm newly diagnosed with celiac (december) and am largely asymptomatic. i've been gluten free for just over 5 weeks. In the last week or so, I've been getting headaches in the afternoon. I am mostly eating at home, so i'm fairly certain I'm not accidentally eating gluten. Is it possible, this is just my body adapting to no gluten or my body pushing out toxins as my gut heals? If anyone has any experience with this, I'd love to hear it! Thanks!