There's blood in my spit. is this normal or should i be worried?

Where is it from: You should figure out if the blood in your spit is from your mouth including gums, from your upper airway (i.e. Nose) or from your throat or if you are producing sputum from your lungs that has blood in it. If coming from your mouth or nose and you can identify where it is coming from (a sore, dry nose, etc) then you will want to find out how to stop it. If from your throat or lungs, get checked.

Blood: If it is in your saliva, it could be from a tooth, a cut in the mouth, biting your tongue. If it is from your throat, it could be from your nose (postnasal drip), your throat (growths) or your lungs. See your doctor if it does not improve quickly.