Could I be pregnant?🧐

So, I have somewhat irregular periods...I get one every month but it varies by day. One month I’ll get it on the 10th, 16th, 27th..etc.

Weirdly enough I haven’t had my period since November 27th now. Negative tests, however in December my husband and I had sex around the time I could’ve been ovulating....wondering if I could’ve gotten pregnant in December which is why my period didn’t come and if I should test towards the end of January.... my obgyn said I was most likely ovulating around dec 22nd and my husband and I had sex around dec like 20th. HAS THIS HAPPENED TO ANYONE!!?