I think the first thing you should do is try and master quick hand-expressing - so that if you get too full you can get comfy again.
The standard advice for "dropping feeds" (which is kind of what you want to do) is to drop no faster than one a week.
SOme babies detest bottles, and it takes some fiddling around with cups or spoons or whatever to work out how to actually feed them - so you may want to start that now just to be sure. Some also refuse formula.

If he's 6 months+ it may be simpler to just give him food and water while you are at work rather than bothering with bottles, etc.