My husband and I are trying to conceive and my period is due in 2 days. My period is extremely regular and for the last 2 days, only after I pee, there is a pinkish hint on the toilet paper. Tonight there was a little bit of brownish on the toilet paper after I peed. I took a home prego test this morning and it was negative. Is it still possible I could be pregnant? Could this be implantation bleeding?