hiya ,
i doubt that there is anything wrong with the baby as of yet , i dont think there is anything to worry about , the blood that is comming from in your mouth may to an infection in the throat , it very raer for you to be brining up blood in pregnancy , unless its from the lower part of the body , how many weeks are you , maybe its due to worry or stress , my advice would be to go see your g.p just for your own peice of mind , and then maybe even try some herbal tea , like cammomile or green tea ? ..hope this helps and luck with new baby xxx