Tufting involves a lot of sitting and using a tufting gun which has some vibration, so it might be worth checking with your gynae first before booking, especially depending on which trimester you are in.
For JB, a lot of pregnant ladies find a prenatal massage a really nice option since there are quite a few spas there that offer it at a lower price than Singapore, and you can pair it with a slow afternoon at a nice cafe since the food scene in JB is really good for makan hunting without too much walking around.