Could just be the reed that is causing the squeaks - especially as you say that it just started. I find that reeds do become too soaked but then I have heard that some people keep them in water all the time. I have tried keeping the tips in a drop of water in a jar and I have found this to make them very muffled and unresponsive - but not squeaky.
Try a different reed - also try more or less MP in your mouth and consider the angle at which the MP is entering your mouth. Next I would consider if you are supporting with a consistent air stream and finally, and this is not very pretty but, tension can sometimes cause one to start squeaking `:shocked: So staying relaxed and working on approaching that note from different leading notes can help.
I'm sure it will pass so don't let it bother you unduly.
SteveK