Credit score dropped w/o any reason

I have a freeze on my credit. I pay off my credit cards before finance charges occur. Credit utilization is very low ( 1% maybe at any given time). This past week, my score dropped 37 points. Tried getting ahold of Experian, Equifax, TransUnion but all I get are automated responses. No live persons to make an inquiry with. The credit freeze should keep my mind at ease but a precipitous drop in credit score makes me wonder if the scoring algorithm is messed up. I’ll check my score in a few weeks to see if this is a glitch. What can I do otherwise?

If it’s in the high 700s to 800s don’t worry about it. Doesn’t matter.