You are hurt and angry and justifiably. However, I want to remind you that this is your community of believers. If you have not written yet, perhaps you would entreat them to search their hearts and God's guidance in realizing that they have been affected by the "perversions of the world" when it comes to their views on nursing and remind them that the church is supposed to be a family. If not for your benefit, then for the good of any mother who steps into that church in the future.
You may not ever feel comfortable returning, but remember that they are imperfect and I pray that they realize that they stepped away from what is true. Include the scripture mentioned earlier, Isaiah 49:14-16, because God is not pornographic and would not be compared with something dirty. There are many other verses that discuss nursing in a matter of fact way. Especially as your husband is planning to be a pastor, it is important to educate them. I am so sorry that you have been treated this way.