2 day period? Tmi

Emma • 9 miscarriages & ectopics 🌈 #13 years TTC for our rainbow 🌈 31❤️
So I bled for one day,  second day I just had brown discharge?  I was a week late to, Tested BFN's.. I haven't been stressed or any other cause for concern in my life.. Nothing has changed? Very confused very Crampy to?!..  Any ideas? 
Thank you