Reading all what you did, sound like you pushed yourself through too much. This time just be constant with 3-4 hrs of study M-F and Weekends 6hrs. No distractions, I know is a little bit difficult with two kids (son and husband) lol because I'm in the same boat, but we can do this! My advice and is what I will do is start studying the topics where more I failed, focused in practicing and understanding the concept to apply similar problems, but not the same.
I was very confident that I did a great morning, thinking that nailed 30 of the 40 and I only did 22 correct, in the afternoon I though that I failed and I did 26 correct (i'm including my diagnostic report). With that being said, the key is not be too confident and double check each questions thinking out of the box.
Also, we can do an online support group to discuss problems, this will help.