I've been feeling a lot better recently but every month in line with my hormones I usually spiral. However, I am starting to realise that instead of seeing this time and a time to dread ... It is actually a time to heal as it brings up all the pain that I need to process. 
The last two days I have had a few tearful moments... But instead of feeling sadness or anger towards my husband for what he did, I seem to be feeling moments of sadness and guilt/shame for not knowing my worth. I used to feel so lucky my husband had 'chosen' me, he was the prize and I wasn't worthy of a man like him. Strangely, I had boyfriends before him that has high flying careers but were down to earth and kind and treated ME like the prize and time and time again I ended the relationships. 
With my husband I thought he was the prize, I always felt insecure and always worried he would leave me for someone better (I regularly asked him if he was cheating on me as I was so insecure). 
I realise I always thought he would cheat on me...but I think I thought it was because he would find someone better than me. I never thought he would use his mate's wife - a woman with low self esteem, an alcoholic woman who everyone had had a bit of - as a free prostitute!
l now realise that although my husband wooed me for the first year, once we were established as a couple, my husband really didn't treat me well or like I was the prize (he does now and has got several years). I don't ever remember him looking after me while I was pregnant, or telling me how he felt or giving me any kind of validation. My husband agrees and says he can't ever remember treating me with presents or telling me he was proud of me etc when I was pregnant/raising young kids (which is the complete opposite of how he is now). It's sad that I accepted that kind of relationship. I don't know if it was because I could see the potential in him (the man he is today) or I didn't believe I deserved any better, or most probably, a bit of both. I used to say a meteor could fall out of the sky and it would somehow be my fault. I used to believe he only married me because I was pregnant and he didn't love me. I used to feel little more than 'a hole' when it came to intimacy.
Things changed around two years after his affair (about 10 years ago). I started pursuing education and started asking for my emotional needs to be met (I told him if I ever left him it would be for a conversation not sex). Then we both went through a tough time around 2018 and we both supported each other through it and I guess realised how strong our love was. I stopped asking him if he was cheating on me, I didn't feel insecure in the relationship anymore, and I started asked 'have you ever cheated on me?'. He always said no and always elaborated that I was the mother of his children and he would never disrespect me like that.
Anyway, the point is, I think I've figured out what my therapist meant early on when she said I needed to forgive myself....I thought she meant I needed to forgive myself for not being a good enough wife and that I contributed to his choice to cheat but she meant I needed to forgive myself for not valuing myself, not trusting my instincts, not enforcing my boundaries, not knowing my worth
I know my parent's abusive relationship set a very low bar in my expectations if marriage and understand how this contributed to me accepting this sort of treatment and it also influenced how I behaved in the marriage. Likewise my husband has his own FOO issues, in particular, a chaotic mother. 
So I'm starting the work on forgiving myself and recognising that his affair was his issue, his responsibility and nothing I did it didn't do made him cheat, and I hope to one day forgive him fully for it. I also need to realise it's easy for 44 year old me to feel 28 year old me should have been stronger and enforced boundaries but I need to forgive myself and have compassion for myself - I was a young mum of three with no family support who was doing the best she could to hold her family together and create the loving family she never had. 
On DD and for months after, I was so broken...I was convinced I would never be whole again. I was convinced I died inside that day, but I am learning so much through this process...I feel like I'm turning into a whole new person. Maybe the old me did die that day, but I'm creating a new me I like a hell of a lot more.
 [This message edited by Evio at 10:36 AM, Monday, November 3rd]