I think it might be worth it, GeneGenie. My GP referred me to the dentist who referred my to the dental hospital and they DID recommend a mouthguard. It does help because it holds your jaws apart just a bit, so even if you feel like you're clenching hard, you're not doing it as hard as before. Which may be enough.
In the meantime, maybe a warm water bottle or heat patchiest might ease it? Worth a try, possibly.
In other news, now we're being told we can't use water so much. We've all been using too much in lockdown: www.bbc.co.uk/news/uk-52893790
A couple of weeks ago, following weeks of non collection of recycling bins owing to bastard lockdown, we went through the bin, took out all paper and card and burned it to make space. Turns out we weren't;t allowed to do that either. In case it made breathing more difficult for the non existent people locally with Covid-19.
I wonder what we CAN do? 