TTC baby #1

Help!

So me & my significant other have been TTC for almost a year now with no luck. However, my AF is now 2 days late. My period is NEVER late. I’ve been experiencing some early pregnancy symptoms, but I’ve taken 3 pregnancy tests all BFN. 😔 I took one 5 days before my missed period, another one 2 days before my expected period, and the last one today 2 days AFTER my missed period. Any other ladies experience a BFP after several BFN results? When would you recommend I take a 4th pregnancy test?