Am i wrong for being upset?

So im 18 SO is 19, we live together and make almost 5,000 a month together. I am 17 weeks pregnant now and we announced our pregnancy to our families last week the day after we found out the gender (GIRL!) and my mom was excited but my dad was just meh (understandable) but SOs mother went nuts and tried to tell me i needed to get an abortion because I wasnt ready for a child and she doesnt want to be a grandma. Well i just walked out because shes never liked me anyway and it wasnt worth it. She hasnt talked to us since and he is worried that she wont be in our babys life and i had said if she doesnt want to be a grandma she doesnt have to be. He has 2 grandmas and 2 great grandmas plus we have my mom and my 2 grandmas so our little one will have plenty of other grandmas that actually want to be in the babys life. So now hes mad at me and idk what to do. Help me gain perspective here because if my mom reacted the same id say the same thing. My baby needs no negativity