Why am I having Blasphemous thoughts?

Hello i am a Christian. Lately, Satan has been attacking me with blasphemous thoughts. They have been occurring randomly and I know these are from the devil because they have been happening uncontrollably. I have responded through prayer and through reciting verses. Did I do the unforgivable sin? I have never spoke against the Holy Spirit. Please I need help and advice. Please it would be helpful to have advice from people who have gone through what I am going through. I would never speak against the Holy Spirit especially how much it has helped me and guided me. I need help.