I have mixed feelings about this pregnancy 😔

My daughter is 16 months , both my fiancé and I are 21 years.. i found out yesterday I’m pregnant.. but I want to be happy with the news I kinda am but I’m more scared , nervous , how it’ll affect my daughter, I just don’t know how to go about all this.. not to mention we are living with his mom and when she found out about my daughter; she lost it. She hated me for about 5 months straight , wouldn’t talk to us, kept making comments about me getting an abortion, but my fiancé was really happy about my first one but he’s mad, upset about this one now & I just feel like I’m alone in all this 😔

*edit I forgot to say that I was on birth control too & got pregnant on it