Spotting

Hi all, today after I went for a wee there was pink spotting so wiped a few times and still the same. I’ve had nothing since. Not sure if it’s maybe the start of my period coming back or something else? I’ve not had a period since I got pregnant with my youngest on Feb 2021 and I’ve been breastfeeding her since she was born- she’s 17 months now. So I’m unsure what it could be. I did do a pregnancy test on Thursday which was negative