8 month sleep, Littles one sleep program help

[Jematron]

So I don’t really no where to turn. Hoping to have some help or at least reassurance.

My baby girl has been a good sleeper from day one, I was the mum who was the envy of playgroups, most nights she slept 7-7 with no waking at a few months old.
She got sick at 6 months and that all changed. We got into the rock to sleep and now has to be in a deep sleep before she will go into her cot without waking and crying.

She perfectly happy through the day and my only problem is having to sit with her until she can be put in her cot. She doesn’t self settle at all.

She’s 8 months now and having to sit with her for an hour - 1.5 hours 3 times a night was starting to get very difficult.
So I’ve started the little ones sleep program after heavy Facebook suggestion.
After a few days on the program she waking up more, is harder to settle at night and having to stick to the plan I’m finding hard to leave the house.

On top of this I’m trying to wean her and she’s not really eating much solids so another thing to worry about 😭

My mental health is effected now too. I just want to do what’s best for her. I spend all my time off reading obsessively to try to help her at night. I don’t no if to keep going that it hasn’t been long enough to make a difference or if it’s the 8 month sleep regression or her gums are annoying her. I just don’t no what to do.

Don't worry about solids, milk is their main sustenance until one and regardless of what you're told she may need night feeds still

It must be so hard from having a wonderful sleeper to a more tricky situation .... my son hasn’t and still doesn’t sleep through at 14 months
But I hear about the self settle situation.
My bedtime routine is:-
Bath
Story form a book
Cuddles while we watch either hungry caterpillar or the quiet cricket on utube brightness on lowest setting ... ( we find it sleepy he will sleep pretty much straight after )
Put in cot done.

But if he isn’t he goes in cot ... if he cry’s or stands he is ignored ...
If he lays down he gets praise and a stroked back then left .... rinse repeat takes about 15 -20 mins now ... and then he gives up
And goes to sleep.

Kinda of a soft version of the cry technique ... first few goes took longer

I think he has no naps and 2 hours to get sleep that night but the shortened when he knew I meant business ( thankfully settles 90% of the time well after his night feeds .)

I will calpol him if he is teething before bed to help take that discomfort away

Don’t know if there is anything in there that’s worth trying ... good luck op