If you have not had unprotected sex previously, you would not have a risk of pregnancy. If your "period" begins this week, and you then have sex with your husband on the 4th, your birth control pills would still offer the same protection (you would not become pregnant during the time your uterus is sloughing off the uterine lining...which is your "period"). Your "odds" of pregnancy "start over" with every cycle after your "period" ends (sorry to have everything in quotations...women do not actually have a true period when using the pill...it is actually technically called "withdrawal bleeding", but that is irrelevant to your question).
You can take two pills in one day, and they can be an hour apart from each other (to prevent nausea), or you can take them both with food.
Congratulations on your husband coming home!!!!