Anonymous letter

I have thought about writing this post a few times. I don't know where else to post this I don't feel comfortable talking to my friends or family about this. If you figure out who I am please keep it to yourself. Here goes. A few years ago I took a promotion at a different location. I knew a few of the people there pretty well and had worked with them before. I do have animals cat and dog. The people at my new location did not own pets and didn't really care for them. The manager there at the time was fairly new and I didn't know her that well. A few weeks after being there she pulled me in her office and basically said no one there had pets and she knew I did and never wanted to be able to smell them on me or see any kind of pet hair on me. I was completely shocked by this I am a clean person but animal hair happens. I ended up telling to of close friends at work who work right next to me and had been to my house. They were just as surprised by her saying that as I was. Of my whole adult working life no one has ever said something like that to me. Fast forward a year and half later. That manager moved to another location. I got a text a few weeks before I gave birth from this manager saying that she had something for me and wanted my address I didn't think anything of it and gave it to her. The day I came home from the hospital I was looking through the mail we had gotten while I was in the hospital. I received an anonymous letter and it basically said the things that manager had said to me. The letter said I would never succeed in my career due to smelling bad because of my pets and that for the sake of my new baby to please start cleaning my house. We have a down tree in our side yard and some other house things on the outside that need to be fixed. The letter went on to say that our house looks awful on the out side and doesn't look welcoming and that we need to clean up our yard. It was a pretty long letter. I know that she wrote the letter. I never received anything else from her. When I came back from maternity leave she never messaged me and said anything. She left the company a few months back. I thought once she left I would feel better but I don't. I had several miscarriages before I had my baby and went through a lot to get pregnant and have the baby. If you have struggled you know that infertility is not cheap. We chose to try not to go in debt with it. So we didn't focus on some thing like paying someone to move the tree from our side yard or having a yard guy cut some bushes down. When I had the baby and my husband went back to work I wouldn't allow anyone over because I was worried about what people that about me and how I kept house. Getting that letter has changed me it makes me feel like people are saying all these things behind my back. I know I should just ignore it and move on but it's hard sometimes. I feel like my house is never clean enough. My house is no model home it's lived in. I guess what I'm asking for is any tips in how to work through this and get over it.

Update: I just want to say thank your for love and support. This means so much to me. Since posting and reading these comments have thought much about the letter like had before. Maybe just venting it out like this is what I needed.