HELP!! Opk or cm, what's better?

So I do opk but I can't do it the proper way (like 4 hours after waking up in the morning/mid day and again in the afternoon) because of work. So I check daily but most of the time at different times and sometimes only once a day.

The tests always come back negative. But this morning I had EWCM, really clear and stretchy. But couldn't test with opk because I had to leave for a work trip and was in a meeting all day.

Did opk this evening when I first got to check into the hotel and it just says negative and the line even got lighter.

So, what's correct? The cm or the opk? What do you think?