Is the aforementioned divorce considered a divorce under duress, and what is the treatment for obsessive thoughts?

The divorce of one who is coerced is not effective, but the coercion considered [valid] has conditions that vary according to circumstances and individuals. Your knowing that your wife would confine you for days and your fear that the fetus would miscarry if you tried to take the key from her is not sufficient to definitively establish that you were coerced into divorce. The assessment of such matters is entrusted to the ruler. If the mentioned situation was indeed one of coercion, then the intention of divorce at the time of uttering it in that state would make it effective according to some scholars. Therefore, it is advisable to present this matter to the Sharia court or to trusted scholars, while completely disregarding obsessive doubts.