Insight anyone?

Hi all - I had a CP at 4w on 8/27. I bled for four days, again on day 8, and days 12-14. My hcg was at 17 on day 12 so it took a few days for it to get to 0. I'm on day 34 and still haven't gotten my period. I've been taking tests because we are TTC, but they're all negative. Has anyone experienced a super delayed AF after a CP?