TTC something is different this month

I am now 19 days late for my period after the first week I tested 3 different times all negative. Last week I would wipe and and see spotting only when I wipe it was light pink this week for safety I have been wearing a liner today I say I darker brownish red spotting. This is the first time this has happened to me I am usually regular and can always tell when my friend is coming but now nothing but mild cramps a few days. Has anyone had this experience Please Helppppppppp 😱

P.S been ttc for a little over a year just nervous of the outcome