Upset...17yr old dd angry reaction to me having another baby with new partner

[missaw01]

My 17yr old dd found my pregnancy test and I had to confess we are trying for a baby. Her dad left 4 years ago, I met my dp 3 years ago. We all now live together (i have a 14yr old ds too) and are happy. My dp financially supports my kids as their dad is useless.
Dp would like a child of his own, I would like a child with him. I am 39, my dd went crazy, told me im too old, it will ruin her social life if theres a baby. Even said we couldnt afford it and have no room. We do have room, and money isnt that bad. I have always been open and do not want my kids thinking i have secrets from them.
Her reaction shocked me, and i feel really upset and confused, I also told her about the mc i suffered last week. I was 6 weeks. My dp will feel incredibly hurt when i tell him her reaction. I know dp will not treat my kids any different to one of his own. He is more of a dad to them than my ex.
This happened last night, she has not gone to school today, said she was ill. Im dreading going home after work. I tried to reassure her, it changes nothing about how much she and her brother are loved etc..
Its making me question another baby, I was so excited before this and the mc. Dont know what to do.
Lonely and upset x

I had another baby with a new partner when my dd was 11. She was a bit at first mostly because I don't think she liked the idea of mum having a sex life (!) Do you think this could be part of it?

We are now nearly 3 years on and actually dd has been great and loves her little brother to bits!

I don't think you should let your teen dictate what you do. At 17 she is nearly an adult and will shortly be off living her own life more and more. I'd just carry on as normal and reassure her your love for her isn't going to change but at the same time don't let her think she is capable of changing your mind about another baby. It isn't her decision to make.

If everyone listened to their children about having another child almost no second babies would be born!

Sorry about your miscarriage.
She is obviously in shock, and she is feeling confused, hurt, maybe a small childish part of her fears being usurped by a baby. Remember, teenagers are very emotional. Hopefully she will see things differently in time, when the logical part of her brain catches up with the emotional. Don't tell your DP yet what she said, give her a chance to come round, and maybe talk to her some more if you can. Best thing to do is acknowledge and accept her feelings rather than telling her she is being unreasonable (she is, of course). And make sure she knows that how she reacts can't change your mind.

I really hope the reaction was an immediate one and wont be a lasting one. I thought dd would be supportive, as she has had to grow up alot after seeing her parents go through a bitter divorce, throughout it I always maintained a supportive, loving home for her and her brother.
I guess I worry I may lose her along the way, but yes she shouldnt dictate to me, I have always and will always put my children first and make sacrifices for them.
I have told no friends or family about having a baby, I think my sister and mum will be happy for me, my friends will think im crazy starting all over again now mine are teenagers. (they have teased me, 'you wont be having another baby will you?' I wish they would think how me and my dp feel.
I thought like them I would be married forever but life hasnt worked out that way. I feel I have a second chance and am now with the right partner for life. I should be happy but feel so sad and unsupported, I dread telling people when I get pregnant. My dp would feel devastated if he knew all this.