I'd try to do the minimum. If you're in agony in the night, again you can go and hand express the excess in the bathroom.
Sudafed/pseudoephedrine is a decongestant which can reduce milk supply. I know you don't want it to be going into your milk, but if you took one right after the morning BF, it would reduce your milk during the day and would be out of your system by morning. Sage, parsley, peppermint are natural galactocytes - you but you will need a lot (ie STRONG peppermint tea, and peppermint candies, maybe even a peppermint oil massage). Avoid oatmeal!