Not sure if this helps but when i was in my 1st Trimester i had a little bleeding (apparently from when the embryo attached to my uterus or something) anyway i freaked and for 3 days after that i had a brown discharge and the doc says it's just dry blood. So my guess is dry blood.
I wouldnt worry about the hospital thinking your a nurotic pregnant woman, who cares what they think, main thing is that you and your baby are healthy and safe. They get paid either way so might as well make em work for it. lol
Good luck but im sure everything is fine.