13 DPO late AF BFN. Am I out?

nena
Based on glow, my AF is 4 days late but actually 2 days late from the exact date I got it last month. I've been having back pain, back twitches, gas, and or lower abdominal pain. I got off the ring late March but I had a steady AF last month. I look a bit bloated and I think I am pregnant but then again, this would be my first child. I keep getting BFNs but AF is making me double guess. Do you think I'm out?