Well, the first priority is obviously getting well. Pumping and dumping is pretty **** at the best of times, so I think you'd have to be realistic about whether it's even feasible for you right now.
If you haven't already double checked about the medication, it really is worth doing so.
As others have said, it is also entirely possible to stop for a week and then go back to it, though it will depend how the both of you feel about that. Do you have help with the kids at the moment? That seems a greater priority right now.
Take care and hope you're better soon.