Late and BFN

Francesca • I`m 31 and We just had our 3rd baby! A boy after two girls! Lots of losses 😔 my first arrived at 28 weeks, after five years of trying, our second arrived at 34 weeks, and our third arrived at 34 weeks too! So blessed!
Well AF was supposed to show today and nada! Bfn again this morning! Can only imagine the antibiotics has messed my cycle up! Pain is that if I ovulate as squeduled, then if I don't come on tomorrow I'll miss my fertile window AGAIN because of DH's shifts! Why can't anything be easy???