Dealing with family in law? Just need some help

Hi Mums and Dads

I need a bit of help, I have a 2 month old baby and since being pregnant amd having her i dont want to go and meet any of my partners family or see them, i dont like his mum shes so in my face since being pregnant (i didnt have a problem with her b4 i fell pregnant but things changed once i was pregnant)

My partner wants to go and see his family in NSW (we live live in ACT) he wants to stay a night and i just dont want to.

I am very protective of my daughter i dont like people holding her unless its my partner, my mum or dad or sister.

Shes my first bub i just need some help and suggestions on what to do or how to deal with this...

Surley im not the only one like this?