Is there a chance am pregnant

Hi

I got what I thought was my period 6 days late but it was darker and shorter than normal and there wasn’t a lot of it.

2 days after I had pink discharge when wiping only the once.

Since the start iv had nausea stomache cramps lower backache, headaches been very emotional and mood swings swollen boobs these symptoms have not stopped even after the bleed.

I have took a test which was negative could I have had a late implantation, could I be pregnant ??