short luteal phase months after d&c

Lauren
Has anyone had shortened luteal phases after their miscarriage or d&c? I'm going on my 5th cycle after my mmc and d&c and my cycles are getting more and more messed up. I've started to spot days before my period is due and spot after it ends. Last month my dr checked hormone levels at 6dpo and said all was fine. Two days later I started spotting. Then this month I started spotting at 6 dpo and bleeding after sex. Then full blown period 3 days early. So basically I had a 5-6 day luteal phase. I feel like something is terribly wrong but my dr doesn't seem to care. Any advice? Just picked up some B6 to try....