Is it permissible to pray for not conceiving a child from a husband one was forced to marry, and is it true that it is not permissible to use birth control pills without his permission?

It is not permissible for a guardian to marry off his ward without her consent. A woman has the option to continue with a marriage that took place without her consent or to request its annulment. However, taking birth control pills without the husband's knowledge is not a solution. If the woman expresses her consent to the marriage, her right to request annulment is forfeited.