Late..now spotting

Stephanie
Period was due 5/31. Temp dropped dramatically yesterday 6/1. Rose a little today on 6/2. Last night brown spotting but only when I insert toilet paper to check (sorry tmi) nothing coming on to liner. Is this a late implantation or what?! Below are my temps up til today. Haven't tested. Want to give it a full week of being late if I can hold off that long...