Your language is incredibly passive, OP.
"He was asked to move out"
"After this, DH was asked to move out"
"after having a panic attack which his family were called"
"his mum was told about his affair"
I'm assuming you were the person who asked him to move out, who told his mum (not sure about who called his mum when you were panicking.)
You're coming across as a passenger in your own life, letting him set the course and tell you what's happening. Fuck that shit! He's made it clear he wants out, you get in there and take action. No he doesn't get to avoid selling the marital home and splitting the equity with you (and if you sacrificed your career to raise DD, then you're entitled to a bigger payout), nor avoid splitting his pension pot.
So the first thing you do is STOP doing any housework for his benefit. No laundry, no cleaning, no cooking, no life admin. You are no longer a team, he's made that clear, so he doesn't get any teamwork.
The second thing you do is to gather all information about finances you can. Current approx value of house versus amount left on mortgage. His annual salary including all bonuses. His pension statement. Any investments such as other property etc. Your salary inc bonuses and pension statement. Then you take this lot to a solicitor and find out exactly where you stand and what you can realistically expect in a settlement.
Right now he sounds determined to run out the clock until DD is 18 - not for her benefit, but so that he doesn't have to pay maintenance. Think he wouldn't do that? Think again. Have a read through these boards. This man has been lusting after a woman only a little older than said DD. He is currently wearing lust goggles and harbouring huge resentment towards you for "spoiling the fun". He will leave DD in the dust, then blame you for "turning her against me".
Get your plans in place and in motion before he leaves you high and dry with a disadvantageous settlement.
And don't for gods sake do the Pick Me Dance!
www.chumplady.com/2012/04/the-humiliating-dance-of-pick-me/
Sorry if this sounds a bit brutal - I know you must be hurting and feeling totally adrift. Taking action will not only prevent him shafting you, it will also, hopefully, help you feel more in control of your life and more positive about making the future you want for you and DD 