Clomid and egg size

So it was my first cycle on clomid . My egg is 25mm and <a href="https://glowing.com/glow-fertility-program">IUI</a> is scheduled for tomorrow. They said my estrogen was rising based on bloods and to trigger this AM. Is this a normal size egg for clomid ? It seems massive . I’m worried it’s a cyst 😞😞