Hi SJL, I would only consider replacing porous items such as wooden spoons. Metal or plastic items which have been properly washed should be fine. You may find that it is easier for you to eat gluten free as well if your daughter is confirmed as coeliac - we eat a lot of gluten free at home simply because we have a lot of it in the cupboard to suit mum! Particularly sauces, stock, corn flour, gravy mix... all those things you keep in the cupboard and use regularly when cooking. My mum is an extremely sensitive coeliac and we have never had a problem with cross contamination at home, you will soon adjust and it will become second nature to keep 'gluten real' (as my kids call it!) separate from gluten free.

I think it would be a good idea to do get the blood test done as soon as you can... so that you can have an answer one way or another. You sound (understandably!) very stressed, I hope that you are taking care of yourself.