Could I be pregnant?

Patient: Hi, I am trying to get pregnant 2nd time round. My period is due on Friday. On Monday morning I noticed a tiny bloody brown goop in my undies.. it was tiny and I thought here comes my period.. Nothing.. then yesterday a brown spotting was in my undies again but again that was all.. Today there’s nothing.. I have had what feels like period pain for about 2 weeks though.. I am hoping I may be pregnant but thought id get an experts opinion? I have a regular 28 day cycle usually..