I have a headache from sativa herb I think.

I became very social when I first smoked that bag: talking a lot with Brian in a fun new way (I was the one telling the stories and he listened for once). The mood was upbeat, full of hope and energy. 

Same bag: today, gives me a headache and real loopy feel so I went for a walk to chillax in nature. now no loopy anymore, but headache. Could it be the pesticides used at OS?