it's totally normal. there's something about trauma that when you approach the anniversary date, you start to fade right back where you were when you started.  it's all normal and to be expected.  if you'll be patient with yourself and understand what's happening it will get easier and fade a bit.  but, it's a very normal thing that happens.  here's some help from the site for you:  https://www.affairrecovery.com/survivors/samuel/d-day-when-anniversaries-attack

https://www.affairrecovery.com/survivors/samuel/how-do-you-handle-anniversaries-discovering-infidelity

i hope those help you.  but don't let it think you've lost all this progress. you haven't, but it's a reminder moment if you will and will hurt for a few days before and a few days after the date.  go easy on yourself, but don't let yourself stay stuck.

it's normal to be in a tough spot....have you considered maybe you're feeling the impact of it in a way that's very ptsd like?  meaning some betrayed spouses actually develop ptsd from the shock and trauma of it all and need help to process it.  it's a common occurrence.   we advise some betrayeds to consider something called EMDR for the treatment of ptsd like symptoms.  it happens more frequently than you would expect.  it's not something that's untreatable or uncurable, but it sounds like the trauma has affected you so severely that general help isn't doing the trick.  so i would suggest finding an emdr specialist in your area and also taking harboring hope on the site to help you with triggers, reminders and finding a community of other women to stand with you:  https://www.affairrecovery.com/product/harboring-hope