Chrominac A contains chromium its health benefit is debated and Fa50 i havent heard of it, it may be of alternate indian medicine drugs.
As of your concern your ovulation time cannot be calculated without details of your previous menstrual cycle history
Your current period is also around 20 days. Since your husbands stay is for next 15 days only, its better you have regular intercourse in this time period.
50mg is not needed bcoz your ovulation study is normal.
But above all keep in mind becoming pregnant is natural process, the period of stay together and stress
free mind is more important than drugs.