Guys it was literally a question about whether I could still visit the US even after filing the DS160 and booking an interview as those details would then be incorrect. This has nothing to do with me being denied at the border. I know I would be let through.
I have an ESTA, I am a teacher so I don't work in my holidays and visited 3 times with ample time in between each visit with no issues in this process. In fact, last time I went, the officer even joked saying I was 'the gift' after he asked if I brought any gifts for my fiance and I said no
I found inconclusive answers (not a substantial amount of personal experiences) of people travelling in between DS160 submission and their interview to make me feel comfortable risking it, so we have decided against it and will wait the 5 months.
If we are desperate we will try and do a visit in the UK but money is tight with immigration, a pricey move and multiple wedding ceremonies pending ha!