Two days ago DD had a nose bleed in the morning. Nothing massive, stopped after a minute of pressure all well and good.
Later she went on a walk with her friend and the friend's mum. Half an hour later mum rings and tells me DD has had a nose bleed. I told her she had one in the morning and she has wipes and tissues in her back pack and I can come and get her if she wants me to. Her entire tone changed and was very angry I didn't tell her and that it wasn't fair I let her deal with this and "if I had known..".Weird ,but fair enough.
Went to get DD, turn out the "nose bleed" was a couple of sneezes where DD's snot got mixed up with old blood so there were traces but not a full blown one. Friend's mum barely talked to me and when she did was to reiterate that I should've told her. I'm just explaining this because there was no mess for her to clean up, she didn't touch any blood or anything like that. DD sneezed(albeit in her arm not in a tissue) , saw and cleaned herself up.
Later on I sent her a message apologising , saying I didn't really think it was a big deal and asking if there's anything else going going on between the girls or with me that made her react that way.
This morning I got another ranty message about how I don't get it(it's true I really don't ) ,nothing else is going on and she can't believe I'm not taking this seriously. I broke her trust and I should've told her and that's that. At this point I just left it, I still don't get it and I'm not apologising again.
So AIBU? What am I missing?