CD35 of typical 28 day cycle

I've been using Glow for over a year now and my history is like clockwork, 27-29 day cycle. Today is CD35; tested with FMU on Sunday (cd33), bfn. On CD 30, 32 & 33, on FMU, had (tmi) globs of white cm tinged with pink... And then nothing. Boobs feel weird... Typically around CD 20-21 they are super full and sore(also have cystic fibrosis), this month they didn't start to get full until CD31 and they don't feel the same (hard to explain..?)