Thanks for your query.
Sever pain in the right lower part of abdomen may be due to Acute appendictis,Right ureteric stone,Twisted Right ovarian cyst
cannot be clearly diagnosed with Ultrasound
abdomen always.It will be confirmed by Ct scan
I am very sorry that you have cried due to pain.It shows the severity of the condition.
Please consult your Surgeon immediately and get CT scan abdomen done with his advice,so that any disease in the abdomen will be confirmed
Wish you good health