Period is 40 days late. have had slight bleeding only when i wipe. bright red, for about 4 days. periods are usually heavy. implantation bleeding?

Maybe not at 40 days: Only a positive pregnancy test can tell a woman that prior spotting was actually implantation spotting. It can be hard to tell if a woman is pregnant because some of the symptoms seen in early pregnancy can also happen in non-pregnant women. A urine pregnancy test gives a reliable result about 3 weeks after sex (3 weeks after when conception might have occurred), or 1 week after missing a period.