I apologize that it has taken so long to get you a reply. Some questions are more complex and harder to answer than others, and sometimes questions just don't make it to the proper people immediately. Sometimes the additional information provided helps with the answer, as well. In any case, thank you for your patience and persistence.
I first want to look at the entocort (budesonide), a steroid, since you mentioned that the onset of these symptoms began with the drug. While the administration of the drug is intended to produce a beneficial effect on the GI system, because it effects that system, it also has been shown in clinical trials to produce a number of unpleasant side effects as well. These include: nausea, vomiting, abdominal pain, flatulence, and dyspepsia (really just a broad term for an "upset stomach". So there are a number of GI-related side effects to this medication, and it could be related.
You also mention your recent diagnosis with hypothyroidism and synthroid administration. Traditionally, synthroid is begun and monitored every 6-8 weeks until the patient stabilizes, and then at 6 months and then at a year. You are nearing the 6 month point, and you may be passing it depending on your date of diagnosis. Furthermore, your symptoms could be indicating that you might require an adjustment of dosage, perhaps a decrease.
So I would recommend that you call your physician promptly, and make a visit ASAP. Describe your symptoms and don't neglect to mention the bedesonide, as well. Although I was unable to find any evidence of troublesome interactions between this and synthroid, perhaps your physician will be aware of something. You may just need adjustment of your synthroid dosage, or your GI physician might suggest that it's related to the entocort.
Again, apologies for taking so long to get you an answer. I hope that I have been of some help, let me know if you have any further questions, and take care
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