Tonsillectomy scabs falling off - what to expect?

I am so scared. I am 20 years old, female, and on day 9 of my tonsillectomy recovery, a scab fell off prematurely. It was on the left side of my mouth tucked behind my tongue (I can't see it, I just know where blood was squiring from.). Turns out, blood started pouring out of my mouth, into the toilet. Horrified, I called 911 even though I was choking on my own blood. I filled up the toilet nearly to the rim with blood. I had to be rushed to the ER and had emergency surgery to stop the bleeding. SO... what happened when you lost your scabs? I'm so scared this will happen again when the right side falls off.... =[