Welcome to the forum. As a 40 year type 2 who still only uses pills, I still say controll is a matter of discipline. So is weight gain. Many times we say "Oh I can use insulin to keep the sugar in control so I can now eat....." The thing is the insulin helps control the sugar in our bodies but we still need to watch what we eat very closely and to exercise diligently.
Some weight gain may be caused by the insulin but have you changed anything in the way you eat? Are you getting less exercise? Remember if it is only a 30 minute walk it is still exercise and you need it.
Keep reading and listen to your body and your doc.

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Janlaton
type 2 40 years
Avandia, Glipzide & Metformin
Grandmother to 4 wonderful children
I have diabetes, It does not have me!