6yr old son told me the other day he thought he had a "lump" on his head. i felt around and couldn't feel anything and that was that. however, today he said he had a headache and he could see "dots" sometimes. i know that i sometimes-very rarely-get a migraine type thing where i get zig-zags floating around and sometimes go blind for a few minutes.could this be what he's getting? he went to school as he insisted he wanted to go the beach with his class today.he said it had gone anyway.should i be worrying?..cos i am!