Re: Pump and dump?
How bad is the baby's reflux? Is your baby gaining weight normally and generally happy and healthy? Or is he/she more of the "scrawny screamer" type of baby- growing poorly, uncomfortable all the time?
With the first type of baby, I'd feel free to experiment with coffee. Have a big cup and see what happens. If nothing changes, then I'd try it again a couple of days later. If the baby's really miserable, then maybe it's a good idea to switch to decaf or even to pump and save- though I would consider that a drastic step, and generally a step too far in most cases.
Now, if your baby isn't gaining well, and is consistently uncomfortable, and you already know that caffeine is a problem, I wouldn't experiment. I'd just avoid coffee altogether- unless you have so much extra milk that pumping and saving isn't a big hardship for you, and you can easily swap in some caffeine-free expressed milk. If you're considering swapping in formula, that's likely to make things worse.
As the PP said, caffeine is generally not a problem, when consumed in reasonable amounts.
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