I'm having strong pains in my stomach it feels like something's moving and my embilical code

I’m having strong pains in my stomach it feels like something’s moving and my embilical code is sometimes painful…and also my back just above the waist on the left side now it’s also on my right side…I did pregnant test it came out negative plz help the pain is too much

Urine analysis+ ultrasound is advised for diagnosis.

Urine test plus usg plus beta HCG also do full cp