Lack of sleep is really, really awful, and completely messes with your mind 
My DD was a bad sleeper too, and I remember being very close to a breakdown at 9-10 months - there's a bad sleep regression at that time, which you are presumably just coming out of.
We did very gentle sleep training when DD was just over a year, and finally cracked sleeping through the night.
There's a book called 'Bed timing' which talks about how development stage relates to success in sleep training. 8-11 months is a particularly awful time for sleep and they recommend NOT sleep training at this age.
You'll get a window from 12-16 months - when your baby discovers the joys of walking - which is a great time for sleep training, and if it works for you it's genuinely life changing.
It doesn't need to be harsh: we started with 1 minute waits, going up in 30 second intervals up to a max of 3 minutes. There are a few important things to get right - particularly always increasing the interval (up to the maximum, then sticking to that), and using your voice rather than touch when you go in. The millpond book is very good - worth reading to make sure you get the technique right.
Oh, and don't worry about your baby's development - the wonder weeks app is bonkers. 
Also, don't worry about driving your daughter away - there's a big difference between anxiety during the early months and making your child feel you're disappointed in them throughout their childhood.
Just keep going - it will get easier.