Have you committed a major sin? Do you feel that you can’t seek repentance? Do you think that you can’t make dhikr? Do you think you can’t carry on praying? Do you think you can’t recite Quran?

If you feel like this, remember this is Shaytan. He wants you to stop engaging with Allah and he wants you to feel hopeless. 

Allah can wipe this major sin out. Just turn back to Him. Repent. Don’t give up hope in Allah. Allah’s mercy is much bigger than sins that we commit.