Obese.no period since jan. negative pregnancy test month ago. weird tapping feeling in belly especially at night. any answers?

Need evaluation: I think you would now have other more convincing signs of pregnancy if no periods since January were due to pregnancy. Not sure if, with your concern regarding pregnancy, you are just aware of blood vessel pulsation in the abdomen. See your doctor: consider another pregnancy test, possibly an ultrasound, and other tests she/he may recommend to diagnose your condition. Good wishes:)

Likely gas: It is likely that the feeling is from the movement of gas in the intestine. Not easy to do, but it would be good to lose weight. Have a diet rich in fresh vegetables, fruits, whole grains, low fat milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco or alcohol in any form.