We have just come back from holiday and I have tested positive for Covid. I took a test because both DC came down with a fever and I have a terrible headache since we returned. While on holiday, I started feeling like the ground was slightly rocking, as if on a boat. Its not really bad, but does make me feel slightly quisy. I have had this now for a week Is this a Covid symptom and therefore possible I have had (and spread!) it for all this time? It's the first time anyone in my household has tested positive.