What's going on!!! TMI

My last regular AF started July 15th. I've never had an irregular AF. Always 25day cycle and 4 days of AF. Like clockwork. I got sort of a period in August. I bled for 1 day mediumish. Then spotted Pink/Orangy for 3 more days. I tested twice a week after "AF" negative obviously. But my AF that was suppose to start yesterday is no where to be seen? I don't feel any different. I'm not stressed out, or worried. No medical changes. Nothing I've done differently. Any advice?