BFP after IUI?

Hello! I received my trigger shot 4/18(wed) did IUI 4/19 (Thursday). That Sunday 4/22-Friday I tested everyday to make sure the trigger was out using cheapies. By Thursday I could barely see it and Friday it looked like a clear negative. I skipped testing Saturday, and tested again yesterday with a cheapie and saw a faint line. Took a FRER last night(top), then again this morning (bottom). Could this be my BFP? Supposed to test in 3 days but of course I couldn’t wait 👀