Worried

So my period ended in 4/30. Then on 5/5 I woke up to bright red bleeding with some clots. It lasted four two days. I’ve never had any bleeding like that before. I have an appointment for tomorrow with my gyno. Just worried that something is wrong. I’m supposed to start my period today and I’ve had no signs that it’s about to start. I am ttc but idk if I’m late because of the random bleeding. I’m nervous about my appointment in the morning but I also just want an answer to what happened.