I don't love my cat anymore

After my son was born, I simply can't feel affection for my cat, 25(f), I have a 3 month old baby and since I came home from the maternity ward it's been like this, I feel like I have to protect my son and myself. away from him, that he is dirty and can give my son allergies... I feel very bad, I still do all his tasks with the utmost care, I always leave the litter box clean, I give him the best food on the market, I leave the fresh water and I comb it every other day, but the affection, that love I felt has disappeared... It's killing me, I feel like the worst person in the world and I don't know how to improve and go back to what I was before...