Hi Shell,
Welcome to our internet family. As you said, it's a shame that you needed to find us, but we're glad that you did find us.
You're right - Colazal is not frequently mentioned on this board, as a treatment for MC. Maybe those who use it, don't see a reason to join this board.

Probably, though, it's just not frequently prescribed. For one thing, it's not as heavily promoted, as Asacol, (which is arguably the most popular of the group of 5-ASA meds), or Entocort EC. You're probably correct that your doctor didn't prescribe Asacol because of the lactose ingredient. Many doctors are reluctant to prescribe Entocort, because they don't understand the way it works, and they view it as a typical corticosteroid, with typical corticosteroid side effects. The fact of the matter is, though, that unlike the other corticosteroids, Entocort EC is Enteric-Coated, so that it does not become activated until it reaches the ileum, and the colon. As a result of that, only about 10 to 15% of it is absorbed into the bloodstream, so that it typically has only about 10 to 15% of the side effect risk of the other corticosteroids.
If my memory is not playing tricks on me, I believe that Shirley used Colazal to control her symptoms. Hopefully, she'll notice your post, and either offer some insight into using it, or correct me for making this mistake. There may be one or two other members here, who have used it also, who might have some advice to offer.
The 5-ASA meds are typically slower to bring results than the corticosteroids, but you should be getting close to seeing results, (if the Colazal is going to be effective for you). If you don't see improvement within another month, I would ask my doctor for a prescription for Entocort, if I were in your shoes. Entocort usually shows some benefits within a couple of weeks to a month, for most patients.
The reason why your doctor did not prescribe Entocort right off the bat, might be because Entocort can affect your blood sugar, if you're diabetic. If you were taking Entocort, you might need to check your blood sugar levels extra closely, and you would need to be careful about changing doses, (of Entocort). I'm sure your doctor should be able to advise you on that, though.
Sometimes, it's not easy to see the signs of gluten sensitivity, and it does take a while for the GF diet to bring results, especially for some of us. Are you aware that there is an association between celiac disease and type I diabetes? That means that there is almost surely an association between NCGS, (Non-Celiac Gluten Sensitivity), also. As a diabetic, you are about 10 times as likely to be gluten sensitive, as someone in the general population. Note that the majority of patients with gluten sensitivity are asymptomatic or are not aware of symptoms, as mentioned in the article referenced by the following link.
http://spectrum.diabetesjournals.org/co ... 3/197.full
You can skip over the discussion about blood tests and upper endoscopy exams to check for villus atrophy in the duodenum, in that article, because unless you are a fully developed celiac, those tests results will always be negative. Most of us here on this board are just as sensitive to gluten as most celiacs, (maybe more so), but all of us, (except those who also have fully-developed celiac disease), test negative to those classic celiac screening tests.
In other words, IMO, you are very, very likely to be gluten sensitive. Not just because of the link with diabetes, but because of the fact that the vast majority of MC patients are gluten sensitive.
Again, welcome aboard, and please don't hesitate to ask any questions that come to mind.
Tex (Wayne)