Short luteal phase after MMC

So I had a MMC last October, and the following 3 cycles were alike my typical cycles prior to my MMC. Unfortunately my last 2 cycles (#4 & 5) I have had a luteal phase of 8 days. I used to have a 14 day luteal phase. I had very normal periods the year prior to my MMC, as I had just gotten off of birth control. Now, I’m debating if I should see a reproductive endocrinologist or not. What would you do? My OBGYN won’t do any further testing unless I miscarried 2 more times. At this time, my husband and I feel like our clocks are ticking away, and honestly after my 1st Mc and all of the emotional burden it has caused, I just can’t sit and imagine that.

What would y’all do? Do you think going to an RE would help? Also, if anyone has been through this, how did you handle it?