Late period !!!

Laura
Hi! I'm 36 years old ttc for over a month ! Had my paragard removed after 3 years ... this month in late 5 days and yesterday started spotting pink only when I wipe , today over the day the pink is disappearing , i took a pregnancy test a day after my missed period and it was negative !! Can my body be acting weird after paragard or maybe implantation bleeding ? Thank you