Sorry to hear what you have been going through - it cant have been easy for you. One thing I would say is this..
You have a wonderful little girl who loves you unconditionally and she needs you to be strong and a happy daddy for her. Look at her and be proud of who she is. If you need to, focus yourself solely on her and try your best (I know easier said than done) to submerge yourself in her world; her nursery/schooling, playtime, cooking dinner with her, etc. Look into her eyes and see how pretty she is - she will carry you through this, believe me.
You need to try and stop thinking 'what if' all the time as it is just going to make you even more depressed unecessarily. Worry about court when it happens - there is nothing that can be done now and worrying about it is only going to make you feel even more down. I do think you should complain though as the way you are being treated is unfair.
I hope this isn't harsh reading for you but if you could try and be more positive you will see everything from a slightly different perspective and in turn life will pick up for you. Try and take up something new, too, whether it be going for a mile run around the block once a day or something.