Lack of cm

Laura
Hi girls, wondering if anyone else has had this. Had a mmc in feb and since then been trying again. My cycles are pretty long, 39 days. All through those days on all other months i get varying types and amounts of cm
​Up until ovulation when i have pretty much had the classic eggwhite . This month - nothing! As dry as a bone pretty much all month, save for a little bit of water here and there. Me and the hubby have bd pretty much everyday but im wondering if all the effort is pointless. Anyone got any ideas whats going on or had similar? Look forward to your comments!