Why am I struggling with blasphemous thoughts?

Hello, people. I am Christian and I am struggling with blasphemous thoughts against the holy spirit and I am serious. I mean when I am sitting down doing my business then just randomly in full words Satan attacks me with the blasphemy of the Holy spirit which is saying the work of the Holy spirit is of the devil. After this occurs, I feel a extreme sense of guilt and I feel like I have done the unforgivable sin. I feel like God had rejected me. I keep saying the truth and keep praying to keep me strong but they keep coming back. I know these are attacks of the devil because they are uncontrolled. Please I need some help especially from people who have went through what I am going through. I ask for those people to tell me their experience and give me Bible verses. I need some help because I feel like I am have done the unforgivable sin and I am going to hell. Please I need some help. I want God to hear me. I feel so miserable. I am exhausted and tired of these attacks. I thought God said that you will go through trials and tribulations but that He will never leave us nor forsake us. I love God, Jesus, and the Holy Spirit and I would never truly blaspheme the Holy Spirit. Never. I need help as soon as possible.