4 month old & vacation anxiety without baby. Help!

Savana • 🦋ċĿọṡє ʏọȗŗ єʏєṡ, ọƿєṅ ʏọȗŗ ṃıṅԀ ॐ🦋

So our friends would like us to go on a 2 day trip but we can’t bring our 4 month old baby (just turned 4 mo today!) Mind you, I’ve never been away from my baby for more than 2.5 hrs. They’ll be going to Joshua tree which I went last yr while pregnant and had to put a smile on my face the whole time when really I wanted to cry from the nausea and heat and just go home.

They think I have separation anxiety and need to get over it because babies get older... I mean ya they get older but every day he changes so much and learns something new. Am I wrong for having anxiety? Should I go on this trip even though I really could care less about Joshua Tree? Would it be good for me and my baby? Or should I opt out?

I should also note that I am solely breastfeeding and he’s only had a bottle (with my breastmilk) a handle of times. He also wakes up CONSTANTLY throughout the night still to feed. Sometimes every hour. So if I do end up going, is this unfair to do to his grandmother who will be watching him? And how would I go about pumping while hiking? Do I just let myself leak everywhere?

Help! I need your guidance dear mama’s!