I hope you will not be offended by my personal comment!
You said your stomach keeps getting bigger, is it tender to the touch? Are you able to void your bowels? When you went to the ER did they do an abdominal CAT Scan? If they did not do an abdominal CAT Scan and your symptoms continue to worsen I would encourage you to go back to the hospital and ask for an abdominal CAT Scan. I don’t know if you can request a test like that where you live but hopefully you will get a real Doctor who listens to you and does more testing!
I will keep you in my prayers,
Lindy

Look into finding another Dr. Some Drs have bad bedside manners.

Have you looked into abdominal migranes. A naturalist could do amazing things for stomach. Worth looking into

If this has been a while, go to your family practice Dr and ask for a referral to your specialist bowel hospital. They will take you seriously and carry out proper tests. They changed my life honestly. General medics just don't know, and I have a life threatening condition in my bowel that was ignored all my life caused by hypermobility syndrome which was also ignored a lifetime.
Bowel pain is just the worst, I know, many a night I've rocked with pain for hours x

I’m so very sorry dear one! I wish with all my heart I knew what to say. I’m praying God show His mercy on you and by Divine intervention you would be healed in Jesus’ Name, Amen