Hi, 700plus, I just want to say to you that I know how tough it can be to prepare for a GMAT test while working and having a family, especially when you have a new house. I know all too well about the hassle of buying and moving into a new house. Don't be too harsh on yourself. It's already admirable for you to have the courage to tackle GMAT at this time, and actually find time to study for it.
Don't give up your confidence. You have a good basis to start from. Remember GMAT has its own style. You have to get into its style to get a good score. The fact that you didn't get a good score this time do not mean that you are not good at math and English. You may simply need to get into the rhythm and work on you test skills. I believe three month is sufficient for you to improve your reading pace. I'd do two things if I were you. First I'd read a great amount of materials. Find all the GMAT preparation materials I can find, and simply read their RC passages. I would leave the
OG materials untouched, and I would not even do the questions. (I'd look at them and form an answer but I wouldn't do them as I was testing.) I would simply read, read, read. Get myself familiar with the GMAT materials and its styles. I wouldn't even bother to look up the words that I don't know unless it is really crucial for my understanding of the passage. In that case I'd fire up my online dictionary and look it up. The goal is to have as little interruption as possible when I read. And I'd try to understand the passage without slowing my pace. If I didn't understand, I'd read a second time. But I would not study each and every sentence to make sure I understand every little details. The goal is to understand the general idea of the passage. I'd do it everyday, no matter what. Perhaps two or three passages a day so I would read about 100 passages in two months. The second thing I'd do, is starting from 2 month before the test, in every weekend I'd do some timed RC questions perhaps from the
OG materials, and study each choices afterwards more carefully. I myself feel that to memorize vocabulary may not help me, since those are too boring and not connected to context. I'd prefer to learn words when I read stuff, and to learn the skills of understanding without knowing every words.
Anyways, the biggest thing is not to lose your confidence. Trust yourself, given time, you'll find the feeling.
Best wishes for you next attempt!