cycles regular until ttc

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My cycles have been very regular since my second mc. Before they would last anywhere from 33-56days. Then after my mc they went to 30-31 days for almost 1 year until we decided to ttc again last month with a 34 day cycle And now I'm on day 35. And I know I'm not pregnant because we kinda skipped out on sex this month. I'm not really sure what happened. I'm just frustrated. I'm also having period symptoms like irritability, acne, some cramps.