Abdominal pain.. gas? or something worst?

I just had my surgery ~2 weeks ago... today was my first day back at work (sitting in a chair all day). Today I have been having mild to moderate discomfort in my belly button area on an off all day... It seems to get better and go away for a bit when I pass gass and at the same time I feel a little constipated. Standing/moving around also seems to alivate some of the discomfort...

I took 2 gasX which seemed to half for a little...

Is this just bad gas? Or do I have something like a bowl obstruction? Do I need to go to the ER?

Thanks in advance!

When in doubt call your surgeon. I don't know of any MD's that post on here so I say call and get your surgeon's advice.