Wa `alaykum As-Salamu wa Rahmatullahi wa Barakatuh

 

In the Name of Allah, the All-Merciful, the Mercy-Giving

 

If you had been divorced and your waiting period had expired before you met this man and married him, then you did not sin. And you need not feel guilty.

 

As far as I could infer from your question, you never had harbored a secret intention to marry the man; if that is true, then you need not feel any shame or harbor guilt feeling.

 

Allah is Merciful and so turn to Him seeking His forgiveness. Turn to Allah in the manner He has instructed us:

 

“Our Lord, Take us not to task if we forget or unintentionally do wrong! “Our Lord, place not upon us a burden such as You placed upon those who came before us. Our Lord, do not lay on us burdens such as we have no strength to bear! “And blot out sins, and grant us forgiveness, and shower us with Your mercy! You are our Lord and Protector; so, help us against those who reject the truth!” (Al-Baqarah 2:286)

 

Almighty Allah knows best.