You don't need to say you love her because most of us who've been here know you do 💐
If she isn't at school yet, once in school you'll have a break and some respite which is essential for you.
My young teen is Autistic/PDA and ADHD. Ended up having to go private as everyone gaslit me and NHS assessment declined. The school didn't help. Once diagnosed everything changed for the better. The guilt goes, the shame goes, the gaslighting won't work anymore ( e.g others blaming your parenting). It changes your mentality and mindset which brings some calm.
The Explosive Child is helpful but quite alot to take on. To simplify it, the focus is on doing this;
i. Pick your battles. If you're having a really tough time with behaviour then who cares if one teeth brush session is missed. Let them watch TV with dinner, it's not going to kill them etc etc. Don't buy into the TV is bad, screens are bad whilst you're working this all out.
ii. Move away from authoritative parenting. You don't have to overpower and win. Look at negotiating a bit more over things that aren't a big deal. You want 5 more minutes? Yeah ok, I can do that.
iii. Give choices. This one has been transformative in my life. You want to get dressed now or in 5 minutes?
You want to walk out here yourself or you want me to carry you out? ( Make sure you always follow through on that one).
You going to brush your teeth now or you want me to come brush teeth with you in 5 mins?
Iv. Once child has completely exploded ( it's really a meltdown), just don't speak. Say nothing and just regulate yourself. Talk about what happened and enquire ' what was all that about' at bedtime when everyone is happy and calm.
If PDA is involved, which sounds like it might, autonomy and control is so important to your child. Giving choices as above, the negotiating and letting stupid stuff go allows for autonomy and control and helps immensely to bring less resistance and frustration.
I used to shut myself in my room, cry and imagine punching my child in the head. That's how much it broke me. I never did but the extent to which this broke me is immeasurable. The shame I absorbed from others such as family and parents quick to judge me as an ineffectual parent and the reason for all this behaviour really contributed to this anger and despair. Now it's all gone. My child still challenges me but nowhere near like this and I'm really proud of the person he is ( most the time 😆). He's hilarious, thriving and loves telling everyone he's ND.