Re: weaning by end of September?
others will chime in here, but just for you- you don't want to quit cold turkey or you risk engorgment and discomfort or even mastitis. and i'm sure you don't want to be pumping on that work trip if you don't have to! so if you do decide to wean ahead, keep that in mind. i'm sure it's less of an issue at 20 months than under a year, bute especically if you're prone to anything like that, be careful.
Nursing, pumping, cloth-diapering, babywearing, working professor mama with the awesomest SAHD ever.