Its happening quite often now (2-3 times a day). I have a feeling that my mind can't process anymore now and suddenly everything feels so heavy inside head with little nausea. Inexplicable. What triggers it are stories with loose ends, videos about universe or something i cannot comprehend completely, etc. No problem in reading or writing, just slight headache and nausea, not severe enough to ask for medication. Its like my mind is a computer with limited power and getting extra input.