Trying to conceive

I started spotting after my nexplanon implant was taken out and had unprotected sex a day after (which was intentional) and I stopped spotting. The color was kinda brownish but when I took the tampon out it was red but not a lot of blood. My app says I’m supposed to start my period tomorrow and I have taken two pregnancy tests and both negative. I have been having unprotected sex since the 14th what are my chances of being pregnant? Me and my fiancé want a baby really bad and I’m super impatient.