Waiting for my rainbow baby

My period was supposed to start today, it's almost 7pm and it has yet to come (crossing fingers that it doesn't) however I took a dollar store test yesterday and it came back negative. I'm hoping it was just too early to test or maybe my period isn't regulated since my miscarriage in May. I heard the first 3 months after a miscarriage are the most fertile, this is my third month. I'm going insane we've been been trying now for 2 years! I really want my rainbow baby, sending babydust to everyone out there awaiting their rainbow baby as well!