Green monster

So I'm in a the process of co-hosting a baby shower for my best friend. Hubby and I have been TTC for a while and I'm finding myself getting jealous or upset over stupid things.

I've already put a few hundred into it and I still have more stuff to buy. I suggested deli sandwiches in which she changed to fancy sandwiches handmade on croissants. So that means I need to buy all the supplies and make them for 45 people. I also, suggested a sparkling punch (no alcohol) she changed it to mimosas with real champagne. More stuff to buy. Please I'm the only one who got the jobs that involve making things. When I brought it up she told me she would ask the other host to do it if it was too much for me. Which made me feel bad.

I just want to scream "at least you're having a baby!" Why micromanage this? She's not contributing anything to the shower but keeps coming up with more ideas with stuff that needs to be bought. She's made at me now because I put my foot down.

Am I in the wrong? I feel like I got bite by the green monster and this stress can be too good for our TTC.