Period wanting to start but NOT starting

I have been getting menstrual cramps for the last week or so, hormones are all over the place. Even feeling nauseous.. I took a pregnancy test and its negative so I think my period is wanting to come. I am 6 months PP just about and I have had 1 period that happened last month and now I am technically 19 days late (doesn't say much considering I breastfed)

Has anyone had this happen before? I feel like my hormones are so wacky and I am just waiting for it to come with the cramping but then the cramping goes away for a day or so and comes back for a half a day then leaves again. 🙄