I Am Having A Strange Sensation/feeling In My Abdomen Area.

I am having a strange sensation/feeling in my abdomen area. It feels numb inside from under my chest to right above my private area. It also feels weighted down in lower abdomen area. Those feelings are constant over the last two weeks. Throughout the day it also feels like something is tugging at my belly button from inside, sometimes it is worse than other times. I have been to my Dr. 3 x's over the last two weeks as well as the ER twice. I think they believe I am crazy because they can't find anything. I have had blood work, pelvic exam, urine tests, CT scan and vaginal as well as regular ultrasound of my abdomen and they have found nothing. This is really having a negative affect on my life. I sit or lay all day and when I try to get up and live normally, the tugging occurs and I have to hunch over and lay or sit back down. It is terrible and I am really worried. I did have VSG weight loss laparoscopic surgery five years ago and a tummy tuck three years ago, I have since had two additional cosmetic surgeries all of which they have gone through my belly button as part of the procedure. I am not sure if this has anything to do with my current situation. :-(