Help!!

Angel
I need help I have spotted light pink for 3 days I was supposed to have my period on the 8th I'm always on time and I flow heavy. I just took a digital clear blue pregnancy test and it said bfn. 😂 so I was wondering should I wait tell I have no period in August before I get a blood test bc idk what is going on. I have been ttc and have used conceive plus during my fertile window and idk what is going on I have all the signs of being pregnant and still not bfp. Just light pink spotting in the morning and stops about mid morning.  What's your guys idea.?