Am I pregnant or is it wishful thinking?

September 12th would’ve been the day I conceived and I was supposed to start my period on Friday and it is Sunday and still no sign. I figure the test wouldn’t work yet but I’m so excited. I’ve been having white thin discharge and have had no appetite. My boobs have been sore but I just recently got my nipples pierced so that could just be it. But I’ve also been really stressed. This will be my second pregnancy if I am pregnant. So, do you ladies think it’s possible or am I just wishfully thinking??