No CM | Negative on OPK - when was ovulation ?

Usually I got lots of EWCM CD 13 - CD 15 and the OPK line is darker . This time no EWCM - in fact completely dry and no line at all on OPK on CD 17 now .

We have been trying hard this week - DTD every alternate day but was just wondering if I didn’t ovulate this time or will it happen later or I don’t know what !

Please help - super confused !!