Can I Ovulate After a Missed Period?? 🤞🏻

So, I missed my period in November. Ive taken pregnancy tests and they were negative (as I suspected because we used protection). My partner and I had unprotected sex between the 1st missed cycle and my intended cycle for December (December 18). I’m late, again this cycle, by 5 days. Is it possible I’m actually pregnant from unprotected sex between my 1st missed cycle and the 2nd missed cycle? I’m not sure if I would have even ovulated, which is why I’m confused. I’ve taken tests but all negative, but I would only be 3 weeks along so I’m not sure if it would be “too early”.