Thanks for writing to us.
Mild abdominal cramps in the upper abdomen along with a feeling of fullness is more likely to be related to a gastric acidity rather than ectopic pregnancy
. In case the pain is in the lower abdomen and is persistent then you need to have an ultrsound scan to rule out ectopic pregnancy.
I hope this information has been both informative and helpful for you.
Dr. Rakhi Tayal