It’s completely normal to feel hurt, especially after so many years of marriage when you expected emotional support. It looks like your husband have focused on his family and sister not you. But he may have thought that it will be better for both of us to manage situation without you.
My advice is to calmly and openly talk to him. Tell him that he was hurting you and want to understand why this happened. Overthinking will always make your pain more and more. Overthinking can damage your relationship. Take care of yourself, lean on close friends or family for support, and give it some time clarity and emotional balance will come back.