Oaths in Allah's name

Assalamuwalakum warahmatullahi wabarakatuhu, I made an oath in Allah's name a while back that I will not get married until I join the army of my country (which is muslim), and that if I break this oath and get married before joining then may Allah's curse be on me and may he destroy me. However, my situation has changed now and I fear that I will not be able to join because I must now stay behind to look after my mother since her husband left. My question is, am I now stuck and unable to get married until I fulfill this oath, or is there a way out? I would just pay the kaffarah yameen but I am really AFRAID of invoking Allah's curse and destruction if I break it due to what I stipulated in the oath. Jazakullah khair