There are certain aspects of carrying a weapon on a daily basis that you're just going to have to get used to.
There are certain times when you will be slightly uncomfortable and IMHO there is really nothing you can do about this. After all you are hauling around a solid, unbending, non-conforming 30 ounce chunk of steel.
Three things.......
Get bigger pant's.
Get a quality belt.
Get a quality holster, this means you're going to have to spend some $$. A $10 Uncle Mike's Kydex holster may work fine for monthly trips to the range worn outside the pants, but NOT for daily IWB deep concealment.
I suggest the Milt Sparks Watch 6 or the Versa Max 2. The basic difference between these two is the Versa Max has a ?metal/plastic? insert in the top portion of the holster that helps hold the opening of the holster open, keeping it's shape so that re-holstering your weapon is easier. If you're not going to be taking your weapon out of the holster often, you probably do not need this feature.
More bad new's......most people go through several quality holsters before they arrive on one that they really like, is comfortable to them and that fits their body. They you'll have to think about having one holster for summer wear and one for winter wear.........
Get used to it, adapt your clothing or don't carry. No flames meant, this is just the way it is.