AF vs Spotting

Su

AF doesn’t start until you get a flow correct? I started spotting around 6 PM (11/27/19) and been spotting on and off ever since. It hasn’t been enough to fill a panty liner yet. I’m 2 days late also just wondering if it could be the start of AF or am I still in the running. I’d like to add I’ve gotten 2 faint positives on Friday (11/22/19) went for a urine test at the hospital (11/27/19) and it was negative but she told me it wouldn’t pick up until at least 5 weeks.