BLEEDING IN PREGNANCY? CURIOUS

Who has had periods and been pregnant? 
How many months did you get the bleeding for or how far along where you? 
Did you get bleeding every month at the time you period was due? 
How many days did the bleeding go for? 
Was it heavy or light bleeding? 
SO MANY GIRLS ON HERE SAY THEY HAVE PERIODS (BLEEDING)  AND STILL BE PREGNANT. 
The general sign of pregnancy is that your period stops. So it freaks me out that you could still be pregnant and not be aware because you get your "period" 
I would just love to know what the bleeding was like. Iv had negative tests and periods but still curious. Iv had periods every month still since I had sex (5 periods) I'm still on the pill because I have had negative tests. My periods are heavy for two days and light-medium for three days. So I don't think I'm pregnant but would just like to know.