Thank you for your Question
Your husband doesn’t need to know what has happened especially because you regret it and have InshaAllah repented on it.
But it is crucial to remember that you are under the watch of the Almighty (swt). How will you ever get over this!?
It is time you collected yourself well and ask Allah for forgiveness (one of the conditions of repentance is to never go back to the same sin ever again). InshaAllah this act of seeking for forgiveness will bring peace and confidence in you.
Also, life does not run on the basis of tit for tat. It often may sound that way because people behave that way. But trust me sister, someone else’s actions and doings should not direct yours. Act according to what your fashioner wants out of you and you shall always stand head high and confident InshaAllah.
I find it wise to mention that you should seek some counseling for yourselves (you and husband) and regulate this internal abusive (domestic violence) relation. This is even more important if you have kids or are planning to have one soon.