Cycle confusion

hello all, relatively new to all of this.. been watching my cycles for about 2 months but just got on glow last month, glow app says I should have started AF yesterday, Flo app says tomorrow, I can tell it's coming but nothing yet. this is the first month I'm planning on getting with my sperm donor, about the 10th of the month for a few days. then I wouldn't test until I either miss March's AF or get it and plan another sperm donor BD date.. does this sound right? my cycles are usually pretty light, last 2-3 days so the apps list of 4 days might throw things off anyway just nervous I guess...if it matters I have been taking prenatal vitamins and Saturday started concieve plus vitamins, also have preseed lube for the donor days