Howdy cycle bud,
Your poor thing, I've also had EWCM during one of my past cycles and I too worried that I was ovulating or at the very least about to ( I also hadn't missed a spray). Thankfully, that's not what happened, I had as many eggs as was expected at EPU. I'm not exactly sure what EWCM means during a stim I never bothered to ask FS about it as all turned out well and I thought it didn't really mean that I was Oing.
If this continues to bother you could you call one of the nurses tomorrow?
Hoping everything else is well with your cycle.