I didn't know you couldn't still nurse? My milk actually went away and that was my first indication I was pregnant. I have also heard that ice packs will stop the production and also helps relieve it being uncomfortable.
-Its fine to nurse while pregnant! Nursing releases oxytocin but the amount is very, very low and not enough to cause your uterus to contract.
Some of the ladies in the breast feeding forum recommend using a cold cabbage leaf in your bra to help with the pain of weaning - give that a go and see if that helps. Dropping a feeding every couple of days is the best way to wean baby - sounds like you are doing this the right way but you may need to go a little slower.
I would have loved to continue nursing if I had known I was pregnant I would have just amped up on the calories!!! What better excuse to be able to eat? LOL
When I found out I was pregnant I didn't stop nursing. At first I thought you couldn't nurse and was afraid of miscarriage, but I continued with it and my son is now 13 months and weaned himself almost 2 months ago now. Many women continue to nurse their entire pregnancy and everything is fine. My midwife nursed her son while she was pregnant with #2 and continued to nurse them both after she gave birth...wow. Not sure I could do that, but it's possible I guess. I think the taste of my milk changed and that's why he didn't want to nurse anymore. I would still be doing it if he wanted it but I am also welcoming the break as I will be having this baby in Sept. and will start nursing all over again. The only thing I did was slowly took out one feeding and your body adjusts to the amount of milk to produce. Once he stopped, I was in pain for maybe 2 days (hardly any milk though) and then the milk just dried up. I never tried the cabbage because my breasts never got quite that full to where I needed something cold on them, thankfully. But that is always an option for you. I think weaning slowly is the key. If you just stop all of a sudden, you will be engorged and I know that is painful. It was different for me because my son was already eating solids, so I never supplemented with him, but from what I remember Ivy is still pretty young, right?
As far as I know, you can continue breastfeeding when you are pregnant if you want. I have heard that many babies dont want to nurse because as your hormones change with the new pregnancy, the milk can taste different. I think some women also get less milk with the pregnancy, but I have never heard that there is a reason why you need to quit just because you are pregnant.
I don't have the experience of stopping breastfeeding while pregnant, but when I weaned my daughter off I replaced 1 or 2 feedings a day with formula to let her body adjust. They say to replace one feeding a week, and then another the next week, etc. to help the babies body adjust. One thing I did read is that your not supposed to wrap your breasts tight like your MIL recommended. If you are engorged or in pain - what you can do is either take a warm shower, put cold compresses on them and/or pump out some milk (do not empty yourself, just enough to alleviate the pain). Hope this information helps a little :) Good luck!