DH went through this over the Labor Day weekend. He started out w/ very bad constipation. We tried EVERYTHING and it took over a week to clear that up!!!!!! He was having abdominal pain, but thought that was from the constipation. That was VERY unusual for him, he normally does not have any problems along those lines at all!
He had x-rays, a sonogram and a CT scan. The doctor wasn't convinced it was pancreatitis, but the final sonogram showed that it was. They still aren't sure how he got it, he is not a heavy drinker (hasn't had a drink since July) and his gall bladder appeared fine.
I think his doctor wanted to put him in the hospital, but DH fought that and was able to avoid it. We did spend the majority of Labor Day night at the Urgent Care and he saw his doctor every day that week, except for Friday.
He is feeling much better now, but still has some occasional abdominal pain. He is supposed to call his doctor either this week or next for a follow up.