Henia while Pregnant????

I have been having this huge bulge above my belly button to the bottom of my ribs. I only see it when in a lying postion to sit up, or get off the couch.
I had the Gastric Bypass April 2008.
I am currently 27 weeks.

I went to the ER, they brought me to L&D, they hooked me to monitors, said baby looked good, so they discharged me and said I could go downstairs to the Regular ER....
I was like since it didn't hurt why bother....

Did anyone else have this issue?
If it is a Hernia, what is that like, it looks like the pictures on google for Umbilical hernia.

I read about this in one of my books and I have it too. It has to do with your muscles making room for the baby. Nothing wrong and things should be normal after the baby comes.

I have two hernias my surgeon discovered.  They are not as a result of my pregnancy, but can not be repaired until after the baby comes.  She is due September 6th and he found them about 5 months ago.

One is around my belly button and the other is lower in my pelvis.  They do occassionally hurt, but nothing terrible.  The OB said that neither should impeded a normal delivery.....either vaginal or C-section.

Hope this helps