I had my 4th child 6 months ago, my periods were ok at first but my last 3 have only been for 1 day and very light, though are pretty much a mth inbetween. when I first started having this problem, i was having pelvic pain but a scan came back clear. my pain has since eased but I have nausea and headaches (approx 3 a day), all are worse just before my period though this time my headaches have worstened since.