It is not accurate.
We all understand your situation, some better than others.
I agree with focusing on other things.
I got my NOA1 in November of last year. From that time to now. I have seen the estimate say 3 months, 4 months 3 weeks, 6 weeks etc.
I know it's easier said than done but you and your fiance will have to dig deep to make it through the distance and the infrequent visits because the wait is torture.