PREGO OR NOT??? Help!

I started taking birth control about 2 months ago. I missed my first pill on July 4th and had unprotected sex on July 6th, in which case, my boyfriend finished in me. Following, July 11th I missed my pill again, and had unprotected sex July 14th where again, my boyfriend finished in me. July 14th and July 15th I experienced what looked like spotting but was unsure why. I took a pregnancy test on July 14th, and it came back negative. I know it was too early to tell you for the second time, however, if I were to get pregnant from the first time, wouldn’t that have been positive? My pills say I should start my period on July 17th, however, <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> says July 21st. My question here is, if I would’ve conceived on July 6th, would it show positive on the test I took on July 14th? I’m new to birth control and having sex all the time so I just need some opinions!!! Should I be worried? I’m trying to not freak out until I miss my period however the only normal PMS symptom I’m experiencing is my face breaking out and me being emotional. I usually cramp a ton but haven’t experienced that yet. My body is changing bc of the birth control and I can’t tell the difference between the two.