Pregnancy help. Much worried help us!

There is lot of information that is needed to advise correctly. When was the last period? Since when she is having this complaint? Is there any vaginal discharge or itching? Was there any discomfort during intercourse? Where exactly is the pain, lower or upper or whole abdomen? Is there any burning sensation while passing urine, or any other abnormalities regarding that like frequency? And actually there are few more questions. So you must consult a gynaecologist. However, in 20 days of short time pregnancy should not cause a stomach pain, given that she had had her periods before. Do a UPT/ or get an ultrasound done. Anyway, You must consult a gynaecologist for further investigation, and she'll guide you further.