Obviously mitigations won't help if you're blasted in the face by an airburst (nuclear or biological), but it seems like it could still help if you're on the fringe of exposure.
[edit]: maybe some of the more "extreme" (n95 masks, etc) have some decent level of protection, but I'm not sure anybody knows, at least with this variant. Even for previous variants all I've seen so far are models, which as we all know have a lot of assumptions.
It seems active / non-retired people will have a hard time avoiding it but after all the current wave will stop like the others so maybe I'm wrong.
https://calmcovid.substack.com/p/youre-not-doomed-to-get-omi...
I'm sorry you're sick, that really sucks. I hope it's asymptomatic and you can get back to living your life soon.
For reference, this case is described here:
Gu H, Krishnan P, Ng DYM, Chang LDJ, Liu GYZ, Cheng SSM, et al. Probable transmission of SARS-CoV-2 omicron variant in quarantine hotel, Hong Kong, China, November 2021. Emerg Infect Dis. https://doi.org/10.3201/eid2802.212422
A double vax from back in April or so would have substantially diminished protection by now.
At least you know you did everything you reasonably could and didn't just give up like the "vaxxed and done" crowd.