Citizenship

HI, just looking for advice/similar experience:

Houston Office:
09/06/2018: We received your n400 application
09/24/2018: We received your biometrics
07/25/2019: Interview Schedule - > Result" Decision cannot be made"

 I applied for n400 as soon my dates applied, with the 751 still pending (Houston office is soooo slow)

I went to the n400 interview with my husband, the officer refused to let him in, said it was not a combo interview. Interview was kind of rough, I felt She didn't liked me. Asked me a LOT of question about my life and marriage, asked for new evidence, I answered everything, had every paper.

At the end she said she had everything she needed, gave me the paper that said "decision cannot be made" because she she wanted to review my paperwork because of my 751 pending.
I have a regular marriage, kids, all accounts together, I never go out of the country for more than 2 weeks a year, usually to Mexico, no criminal history, no tickets, very boring normal life, haha.

100 days later no news at all, not online, not on paper,, online still saying "interview scheduled". I tried to schedule infopass ac couple of times but they said I had not enough reason for an appointment, said keep waiting. They do filed a "review reminder" to my officer about a week ago.

Im getting nervous. Already thinking about my next options. I dont want to hire a lawyer:
-Congressman letter?
-Email /letters to uscis? Not sure what address or email to send them tho.

Also, someone posted about a CIS Ombudsman .. Not sure how that one works.

Thanks! Ill keep updating.