Back story: I just bought ovulations tests because my husband and I want to start trying!

Now I’m officially three days late for my period. I’ve taken three tests that are all negative and won’t let myself take any more until I’m officially a week late which then I’ll likely call my doctor. I’m always on time for my cycles like clockwork so this is incredibly frustrating. I have no signs or symptoms of starting my period other than some cramps that have only happened late at night when I’m trying to go to sleep. I’ve been using my diva cup while I’m away from home just Incase I do start but the only thing is a tiny amount of CM and yesterday there was the smallest streak of darker CM. My breasts were sore but are now less sore, even barely at all. I’ve checked my cervix and it did feel soft, one night felt high and the very next day felt lower. I’m so confused at this point and am worried that something could be wrong and I will now face a harder time TTC if my cycle does decide to start.