I would imagine that the blood comes most probably from your gums. Either you hurt your gums somehow (brushed too hard, or hit a bit of gum with the hard part of your brush) or you have a bit of gengivitis (gum inflammation). Nothing to worry too much about. If it persists go get your mouth checked. Now if you were to cough blood as in, when you cough, blood comes out together with phlegm, that is more worrisome. In that case go to a doctor ASAP

It’s possible they are creating the ultimate response of honesty, except it doesn’t take a lot of concocting to be honest. They are buying time. They are contriving a situation for you to escalate so they can then attack when you are not on your game. When they are thinking and they think a lot. Mostly it’s avoidance. You have managed to corner them and for some reason they are not in the mood to fight so they go silent, maybe close their eyes and poof you have disappeared. When they return from their mental vacation they will either act as if they don’t remember what was being discussed or as if nothing prior to the mental break was happening or they will become enraged yet another avoidance tactic. It is also quite possible that whatever is happening has sent them right back to their trauma. They have checked out and are disassociating with everything. They cannot function because the two events are colliding and they cannot be present. Whatever is happening is triggering a very unbearable period of their life and they feel threatened perhaps that their life is threatened and they must escape. When they come back they may be prepared to fight or leave or again avoid. They may be punishing you for whatever they feel you did to slight them so now you get the silent treatment. That usually means they have been up to something and the are trying to throw you off the scent until they need you for something again. Sometimes to mess with your head. Maybe so you will keep asking what’s wrong or if they are okay then lash out for your normally desired attention and try to make you feel insane or at the very least confused.