Sorry, Shuga, but you should not be allowing a doctor to adjust your meds based on TSH. Please note this quote taken from the Sept. 1986 edition of the British Medial Journal.
"We consider that biochemical tests of thyroid function are of
little, if any, value clinically in patients receiving thyroxine
replacement. Most patients are rendered euthyroid by a daily dose
of 100 or 150 ,tg of thyroxine. Further adjustments to the dose
should be made according to the patient's clinical response."
The reason for this conclusion was that all their testing showed that you could not reliably use any of the 5 main thyroid tests to predict which of the groups (hyper, euthyroid, or hypo) a patient should be placed in. This is because of the variability found with each of the 5 tests, TSH, TT3, TT4, FT3, and FT4.
This is only one of the many studies and reasons why it is best to treat a patient clinically by testing and adjusting FT3 and FT4 as necessary to relieve symptoms, without being constrained by resultant TSH levels.
Just because TSH may have been somewhat successful as a diagnostic for you does not mean that it is universally true. I suggest that you read this link also.
http://www.hormonerestoration.com/Thyroid.html
I've had gas problems but was never told it was due to anything thyroid related. I've been hull for many years. Not to say its not related, I was just never told. Constipation however is a big one and that's when I get gas build up. Depression as well. We are most likely going to have these symptoms no matter what. But you have to make sure you keep it under control to avoid many more symptoms. My tsh is now at 0.34, which is considered normal, but I can feel the effects of hyperthyroid and need my medication to be adjusted to bring it to a happy medium. Normal tsh is 0.34-5, I think somewhere in that range. Always check what your levels are and the ranges are. You would be surprised what a difference a slight adjustment makes. I strongly suggest getting your levels checked every three to six months, if you are having symptoms.
Yes bloating and stomach discomfort is a symptom I have had myself during times when I have become hypo. Most recently I had it very bad, while changing meds, but after returning to my old med, Armour thyroid, it was gone after several days. That is because the T3 in Armour acts very quickly, compared to a T4 med.
If you look through this list of hypo symptoms, do you recognize any others besides the gas problem? It may well be that you are either not getting enough of your current medication, or that you need a different medication, if your FT3 is too low.
If you will post your thyroid test results, and reference ranges shown on the lab report members will be happy to help interpret and advise further.