Is a menstruating woman considered an unbeliever, or does her prayer become invalid if she does something she had intended not to do after prayer, especially after her repeated ritual baths for conversion to Islam? And is she considered sinful if her husband has intercourse with her after the declaration of faith (Shahada) but before intercourse itself? And do the clothes she was wearing during her delusion that she was an unbeliever become impure?

Obsessive thoughts have taken a significant hold of you. The only cure for them is to turn away from them, ignore them, and pay them no mind. You do not become a disbeliever because of these obsessive thoughts. Therefore, do not perform ghusl (definition) or utter the Two Testimonies with the intention of entering Islam because of them. Rather, be certain that you are a Muslim and that you do not exit the faith because of these obsessive thoughts. Live your life and interact with your husband normally. Your supplication against someone is not accepted if it was made by mistake, and do not repeat a prayer after finishing it. Ignore the obsessive thoughts and do not give them any attention. Do not pay heed to what Satan whispers to you, suggesting that you have disbelieved.