Period is late 🙄

Sh

My period is 4 days late but I took a test on the day of my expected period and it was negative. I feel bloated and crampy so I just don't know when it's going to come! I'm breastfeeding so I don't know if that's what is messing it up but it came back last month so I was anticipating it.. anybody have this happen to them? I'm 5 months pp