19 days late

Kimberley • Wed, Jan 26 • 👼🏻👼🏻

I’m 19 days late for my period, negative tests but for the past day I’ve had a really bad pain in the lower left of my back, kinda by my hip area.

Does anyone have any ideas? The pain is excruciating and nothing seems to be helping. Tried pain killers and a hot water bottle. Any ideas would be much my appreciated