I had gone through the case and found that it might be due to either lack of eating food or gastric infection or lack of water intake or bladder infection or due to flatulence
So first take proper meal in frequent interval and also take proper water intake.
Go for vitamin D3
and Vitamin B12 blood test
. If deficient then take medicine for that.
If pain reoccur then go for ultrasound of lower abdomen.
Hope my answer will be effective for you.