Thanks for your question.
Best way to sort this out is to have an ultrasound
scan. Although with the given history your chances of a natural pregnancy
are slim but as long as you are having periods ( however rarely), you may conceive. So, don't loose hope & get a pregnancy test done as well. If the tests are negative for pregnancy, then may be gasses in your intestine are the cause of these symptoms.
Wish you best of luck.