Help! d period

I am new to the forum and just wondered whether anyone could help me or had experienced a similar problem. I have had two miscarriages this year, one in April at 9 wks resulting in a D&C and a natural one in July at 5 wks. My last two cycles (August and Sept) seemed to have returned to normal being 28 days long with a positive OPK on day 14. However this month I had no positive OPK and I am now on day 31 with no sign of period, sore breasts and two negative pregnancy tests. Is it possible to have a month with no LH surge or ovulation and how will it affect your cycle length?

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