I also had a sore throat Monday, so I visited another social media site (are we allowed to say Reddit? LOL, too late) because there's a helpful COVID subreddit where people share their information. Quite a few people who have tested positive mentioned sore throat. So I believe I'm going to take a self-test for peace of mind, because I wouldn't want to infect others, even though I'm feeling better now.
For the record, I'm fully vaccinated (April/May) and as of about 10 days ago, I am back to wearing my mask every time I leave the house. I live alone. So you might say, it's probably not COV