HELP - Bleeding after second beta confirmation

Divsu • PCOS, annovulation! Two failed IUIs, IVF - 1st FET- miscarried @8 weeks. 2nd FET failed, 3rd FET chemical, 4th - BFP!!
Ladies, my FET is done on May 17th. I got positive on my first beta and the levels increased for the second beta. My first scan is scheduled for June 12th and now I suddenly started bleeding. 
There was no spotting, no pain but sudden gush of blood. 
I called my clinic emergency line but there was no on-call nurse since it's past 9pm and they advised me to goto ER if needed. 
Is this normal? Or should I run to the emergency now without waiting? Why is this happening to me now 😭😭😭