TTC after chemical

Hi everyone! So I had a chemical pregnancy right at 5 weeks on Jan 2nd. I have still not had a period. I am on CD36 (will be 37 in one hr) and have not bled at all since the CP. my cycles are regular at 28 days. I figured it may be off some but not this off? I had some cramping back a few days ago off and on but none the past couple of days. It doesn’t feel like AF is coming. Is it possible to miss a period completely after a chemical?? Anyone else have a similar story? Or how long did it take you to get AF back? Thanks!

Also I did take a pregnancy test on CD34 just in case and it was negative.