What's the odds of being pregnant and still having your period?

I don't know what the odds are, but many women can have what is called implantation bleeding which can be mistaken for a period. If you're experiencing heavy cramping along with the bleeding, it may indicate complications and possible miscarriage. It may also indicate an ectopic pregnancy (in your fallopian tubes).

Either way, you need to see a doctor.

It's possible. My mother had her period while she was pregnant with me up until her 8th month which is why she had no idea she was pregnant until she had to have some blood tests done to her on her 5th month and they told her. She was shocked because she had no symptoms. It's definitely possible to still have your period while pregnant.

The only 100% accurate way of knowing if you are pregnant is taking blood tests. I don't trust home pregnancy tests as much.