Your husband has H1 approval so you are good to go for H4 stamping. If any question related to location change or any change, upon asking by VO, you can show amendment receipt. Make sure your spouse has valid status in USA. In my view they would like to know there is no fraud here to get H4 visa and your husband has valid status in USA in order to grant you H4. Make sure you have all his documents of your husband and yours.