I ovulated on the 14th/15th September and was sexually active on both these days. On 22nd September I had a small amount of light pink blood but only visible when I wiped, and later that day a small amount of brown spotting. Since then nothing and my period is not due for another six days. I have never had spotting between cycles before so find this a little odd. Took a test today and it was negative... could I still be pregnant?