That's a bad plan. I'm not sure what question you asked the doctor. If you are trying to delay bleeding for a certain period of time, (like if you were going on a scuba trip) that would work.
You're not trying to delay your bleeding. You're trying to shift your viable ovulation time period - which is a completely different thing. Your plan is unlikely to work to move your fertility window one week away. If you take a contraception pill, and then get off it, it could take a few months to ovulate again, although you can regulate bleeding by continuing to take a pill (which is not what you're trying to do).
I'm so sorry for your loss. I sense your intense desire to get pregnant as soon as possible.
Is he coming home permanently April 27? So, you could just wait and try in May? That would be best.
If he's only coming for a brief visit April 27, I would arrange to have his sperm frozen and inseminated in May.
Another option is for you to go visit him where he works during a fertile window. How fun would that be? :D