Diahhrea 6 days post gall bladder removal normal?

Hi.  My name is Chris and I am a 28 y/o male.  I was diagnosed with IBS about 4 years ago and was prescribed numerous drugs throughout the years, but  currently taking Hyoscyamine for it.  My IBS was definitely much more IBS-D than IBS-C.  I also take Buspar for anxiety.

I had my gall bladder out laproscopically on 7/30/07.  I came home the same day and have to say my recovery is progressing modestly.  There are two complications that have come from the surgery and I am starting to get a bit worried:

One is that I developed a hemotoma on my incision on my side.  I went back to the GI surgeon just so he could look at it.  He said it was nothing to worry about and that it would take roughly a month to resolve itself.  He did mention it would spread and look pretty bad (which it is starting to do).  

The other big concern I have is that a few days after sugery (last thurs) Ive developed severe diahhrea (usually only when I eat something).  It seems that just sitting down and starting to eat has triggered it, and when the diahhrea itself is usually yellow, explosive, and gassy.  I dont really have the cramping or anything like that.
Now that I took a little time off from work I've been perusing the internet looking for information about this diahhrea.  It seems that a small amount of people do suffer from this after surgery...some for years at a time.  Needless to say this has only gotten me more scared rather than made me feel better.

I guess my question is this:

Is it normal to have this type of diahhrea roughly a week after surgery?  If so, how soon does it usually last?  Is there anything I can do to treat it?  Yesterday it was a little better (only went twice and in the morning).  I took my hyoscyamine 30 mins before eating lunch and dinner and it helped...only had some gas pain.  Then today I did my same routine (take pill 30 mins before eating) and so far Ive gone 3 x with another coming.  I do have a follow up with the surgeon on weds but I would appreciate any help and reassurance anyone can give.

Thanks
Chris