Has anyone been late for there period and had negatives and still pregnant?

Cycle usually 29 and pretty regular if not usually early. Symptoms- back ache, weird sense of smell, boobs slightly sore when wearing a bra, lower abdomen fullness not pain but definitely a feeling a stitch (hard to explain) We are actively TTC on month 8.

I’m now 8 days late and had negatives since I started testing over 10 days ago up untill today.

Has anyone experienced this and still be pregnant as I can’t see why I would miss my period by sooo much, I haven’t been stressed, no new meds. Doctors are calling tomorrow but I have a feeling due to Covid19 they will just say to wait longer as they won’t want me in the hospital.