Your reasons are good, but you have to involve your congress man from the state where you live in. I expedited my case due to medical reasons and was approved in less than 2weeks. You need to get your congressman involved asap
Before your interview, you’ll be given instructions on what to bring on your interview day and also the only two specific places to go do your medical exam which is in Lagos.
It takes up to 3months for nvc case filled online to be approved .
It takes up to a year and six months to get a visa interview after nvc approves your case online.
They send you a letter via email for an interview appointment