Am I wrong for this?

My friend is engaged and has been engaged almost 2 years. I don’t feel like she’s in a rush to get married... however I’m pregnant and I’m due in September. She told me she plans to have her wedding in October. I told her that was fine but I couldn’t be sure that I would be there, I mean I wouldn’t even be a month post partem and this is my first pregnancy. She seems to be upset with me now but if she really wanted me to be there I feel like she would change her date since I can’t change the date of when my baby will come?

Edit: I’m not asking her to change her date, I’m telling her I might not be there and she is upset with me. My priority would be the baby and my well being not her wedding. I think if she really wants me to be there she could change the date or just not have me there?