Implantation or chemical pregnancy ?

Emma

Hi,

I'm 11dpo today, period should be due tomorrow (always around 12dpo). I had some pink discharge on wiping at 9dpo, a bit more yesterday and more again this morning (only really evident on wiping/slight staining of a pantyliner). It is very very light, and usually my periods are heavy for the first 2-3 days. I kept thinking it was my period starting early, but today I took a pregnancy test and it had a very faint positive line. I can't get excited though, as i have no idea if it was implantation bleeding at 9dpo, or am I experiencing a chemical pregnancy ?! Does anyone have any experience of these 2 things?