Ok, don't know what is going on?!?

Had the faintest line yesterday morning (13dpo). A slightly darker line this morning(still had to squint to see it). Both with internet cheapie test. Tested this afternoon with 4 hour hold urine with a frer test and you could definitely see a faint line! Went to wipe and saw cm with the slightest tinge of pink in it... I have been having period like cramps today (af is due today)... Should I worry, or is this normal... With my other two pregnancy I never noticed any bleeding...