stains help😁

So during the night I was sleeping on my back and I woke up with my pajamas stained. But the blood didn't even get on the pad at all🙄 it was all stained on the butt area to my lower back of my underwear and pajamas! Wth🙄😒 anyway I was borrowing my moms pajamas because mine were dirty so I stained it. How do I get rid of dry blood from clothes?😁 Also how can I avoid the pad thing from happening, it's so irritating and embarrassing ugh!