I know this a long shot...

But on April 26th I underwent a hystroscopy just 3 days before my period. I ended up starting a day early (Sunday) I figure because of of the surgery and I thought I had ended my period on Saturday because all I was having was just the “end of period discharge” but this morning I woke up in a puddle of blood (I’m sorry tmi) has anyone else by chance experienced this? Any idea why this happened? I know y’all ain’t drs but just thought I’d try and get you lovely girls advice and input.