I would say have another child. The first classes do not have clinical time involved. Your child will probably arrive before that becomes the norm. Being pregnant should not deter you from nursing school.
Do you know if there are openings in the program you are looking to attend? I would say, have the child and then go to nursing school. I was 26 when I decided to attend. Nursing will always be something to aspire to, but I would not wait.
From what I understand of the testing process, the least amount of questions you would answer is 75. You answered 85. I believe that you may congratulate yourself for passing the NCLEX. When I took the test, everyone in the country was required to take the test on the same 2 days, in July 1983. We did it with paper and pencil. I got the results in September.