Hi and welcome to the boards

. Sorry it's taken me a little while to respond, we seem to be quite busy atm

It is so difficult when they start waking so often, you have big ((hugs)) from me there. Would you mind posting your day time routine for me in easy format to take a peek at? Including all NW's too if you don't mind. I have a feeling something might be a little off during the day if she's finding it so difficult to fall asleep. Has she ever been an independent sleeper before all these troubles started? Have you tried ssh/pat? Some bubbas find pu/pd too stimulating so we tend to start off with ssh/pat and take it from there.
There is a massive growth spurt at 4mo and a developmental leap too. For us it was the 4mo sleep regression and the 18mo ones that were the hardest. I'll post some links for you to have a read through for tonight and wait to hear from you wrt to the day and we'll make a plan ok? Xx
Shush-pat - How toSix Weeks to Four Months: Growth Spurts - How to tackle them