Late period then lasted 2 days

Rachel

I was supposed to start AF on 7/16 but didn’t start until 7/18. I always have really heavy periods with clotting that lasts 6-7 days. This period was extremely light with no clots and lasted only 2 days. The 3rd day was brown discharge and I also had that same brown discharge on CD 10 & 11. I haven’t tested since the day I started bleeding. Has anyone ever had this happen and be pregnant or am I grasping for straws here?