@BeadyRoller it sounds like your G-Sync is not actually engaged properly, try going into Nvidia control panel, firstly in "display tab" set your resolution and refresh rate to 144hz, then in the "3d settings" tab change it from fixed refresh into G-sync mode, next go to the "set up G-Sync" tab and make sure "enable G-Sync" is ticked.
also in the "3d settings" tab, you will need to set "low latency mode" to Ultra, and set a suitable "max frame rate" of something like 142
PS you would notice some improvement last time by enabling the fixed refresh but G-sync is better, the two shouldn't be working at the same time.