That’s normal sister.
What is important about reconciliation is the work.
One month seems really fast for. Cheater to make that radical turn, healing and change of personality.
When things are so fast usually is no regret, is camouflage.
The cheater rugsweeping the betrayal and managing the betrayed partner (who above all would like to persuade themselves that the betrayal was not real, that it was some terrible mistake and whatnot, instead of understanding that their partner IS a cheater, is a Liar, Is having No regrets, and is going to do that again and again, just most carefully so you won’t catch them).
I tell you because if you are devastated now, trust when I say you will be even more devastated if one day you’ll discover that reconciliation was just another lie, another betrayal, with more to come (or continue).
Are you absolutely sure that your husband is changed so deeply and seeking help, accepting all consequences of his betrayal, even if those consequences were you would decide to abandon him one day?
The rollercoaster is normal, it will get worse, then slowly better. But is not worthy to ride that nightmare carousel unless you really believe is worthy