Mensturating during pregnancy?

[hisbloodformysins]

Well, I've had two normal periods past couple months, with some cramping and some heaviness, however, they were just a little lighter than normal. I've also had some lactating from one of my breasts though I haven't nursed for over a year, and have been getting constipated.... which usually happens when I'm pregnant. I have wondered due to the constipation and lactating, but well, being how I've had normal periods I haven't taken a pregnancy test. Tonight I read somewhere that it is possible, though very rare to have a normal mensus during pregnancy. My question is has anyone here ever experianced that?

I went and bought a home pregnancy test and it ended up being invalid, a dud... the control window didn't work. So that didn't tell much.

HB