Try going to the slowest flow nipple, offering a little from the bottle to help satiate the
hunger to avoid the
frustration and see about offering the breast
You may also try some of the boosting tricks like non-alcoholic beer, oatmeal, fenugreek, etc.
It is normal for a nursing baby to eat every 2 hours or more, especially when stressed or even just while growing. Suckling eases pain and calms a baby.