Could I still be pregnant?

Brooke

My period was due the first of this month. It was a no show. Took a test and negative. As the days went by I took two more tests and they were negative. Now at 13 days late I’m at a stand still. Last night when I wiped I seen pink blood on the toilet paper. But now I’m not bleeding at all. I put a pad on and nothing was on the pad at all. So all day I haven’t had a pad on. I have been feeling menstrual like cramps but lighter. I talked to my doctor and she told me I could possibly still be pregnant. But how? If it’s not showing on the test? She won’t do anything until my period is 3 months late.