I need advice!!

I know that I am feeling like this because of pregnancy hormones but I need help!!! Before I was pregnant i was simply in love with my niece! She is my only niece, and I simply just love her!! But now I am 6 weeks pregnant and I can't stand her.... 😭😭😭😭 I watch her 3 days a week while her mom and my brother work and I just get annoyed with her... What's happening to me???? I need help! Is this happened to anyone else?? Can  I do something to fix this?? She is almost 2 years old. Please help me!!!!!!!!!!! 😭😭😭😭😭😭😭😭😭