Parents in law 😭

Hi so I've been planning my wedding 2.5 weeks now. It's been booked 4 days. I have my mum and 3 best friends. I've just read my book and wrote in my diary. But I downloaded this app a couple days ago and saw this part. Without the obvious talk to them. I've put above how long it's been such a short amount of time and his parents have already got involved on 8 points already and I don't know how to handle them. I've been with my fiancé 9 years, he's an only child and they're paying for it 😭it very much feels the money comes with side notes if that makes sense of owing them. And his mum acting like it's her day. It's taking the excitement away from me. I feel I'm mentally not well enough because I try to please everyone and that's impossible. She has very strong views and also outdated opinions. I don't want to upset her nor my partner but I just wish she didn't give her opinion because it's not her day. And I feel I'm doing stuff to make her happy and that's not right. A very stressed upset fiancé and I don't want 18 months of this. I've already had 2.5 weeks i need to nip it in the bud straight away. I don't know if the way to cope with it is to not include her in details and pay bits myself but then I feel guilty if I'm upsetting them but I need to do it for my own mentally health. Thank you very much if you've read this far x, x