Is there a new covid strain going around?

Last week I felt extremely irritable and mentally “out of it”. About three days ago I started getting congested and I’ve been coughing a lot. No fever though. But I’ve been sleeping a ton lately. Feel very tired.

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Got tested for both covid and the flu today. Negative for both. If I’m not feeling better by tomorrow I might get on antibiotics.
Is there a new covid strain going around?
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