I cheated on my husband. I regret it so much. I have been crying for (removed) days about it I just feel the guilt so much within me. I did pray to Allah for forgiveness but I still feel this extreme huge guilt and I feel like an extreme bad person

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What you have done is a major sin and you must seek genuine repentance from Allah (swt). If you are sincere in being remorseful and you make a commitment not to do it again He will forgive you.
Don’t despair from His mercy. He forgives all sins. We all do mistakes but as long as we acknowledge we have and we want to correct it then He will help us. Give charity as much as you can and do good deeds. Make sure you keep pushing Satan away since he will be back to tempt you again