Prozac + teeth grinding, buspar?

Hi all, I recently started taking Prozac for anxiety about a month ago. I started at 10mg for 2 weeks and moved up to 20, it’s been about 2 weeks on that.
Ever since I started this medication I have been excessively grinding my teeth to the point where my fiancé is waking me up at night. I bought a mouth guard from the store for now and I’m grinding through that too. It’s all night and during the day as well, my jaw is sore! I can catch myself and stop for about 10 seconds but then it resumes.
I had a follow up with my psychiatrist today and he said if this continues we need to switch to something else. He suggested adding in Buspar to the mix as it can help with things like that. I previously took buspar before Prozac so I’m familiar with it, but does anyone also have issues with teeth grinding from this medication and have found relief with buspar? thanks!