Luteal phase length

So ever since my mc my luteal phase is only 11 days . I'm scared that's not enough time for implantation z my doctor thinks I'm nuts - he's very laid back - but I read somewhere that anything under 12 can decrease your chances for implantation . I had a chemical last month after having a d and c in October for blighted ovum . Just wondering if you guys have heard of this or what your average luteal phase length was . The two week wait is really 11 days for me !!!