Any BFN until AF was due then BFP???

Codi • I`m Codi! I`m 28. My husband and I have an awesome 7 year old little girl and just got our BFP October 22nd due July 4th
Anyone start testing early and not get a BFP until after missed period? I'm due for AF on 4/2 and started testing on 3/29 and all BFN. I'm experiencing symptoms out of the ordinary for me. Usually I never test this much! Only if I'm two or more days late which is rare