Short lutheal phase

Maria
Hi all!
Been ttc for 22mth and made two IUIs and two IVFs. I am now suspecting that my lutheal phase is to short (almost never longer than 10 days even if I take progesterone) and my dr days the only treatment available is progesterone (I've tried both Lutinus and Crinone). 
Anyone else experienced this problem and did you try any other treatment? Any success?
Thanks in advance for your thoughts!