Why don't you get an ultrasound
scan of the abdomen and check for on-going inflammation like Appendicitis
or even colitis?
I see that you have seen the doctor but I do not know what she said to you or if she did a scan on you.
Absence or presence of pregnancy
can also be confirmed on a scan of the pelvis. Please do it if it is not done until now.
There is no point in worrying. You should go ahead, get it investigated and get treated again.
I wish you quick recovery.
Get well soon.