Thanks for using HCM.
As you have mentioned about blood coming from mouth, if it's bright red colored, source of bleeding will be with in mouth or in throat. Could be from gums due harsh brushing of your teeth,
Use a soft brush to brush your teeths,Consult a ENT specialist
for throat examination.Chest pain
could be due to esophagus
movement as you had while taking food, but better get one ECG done,
Hope i has answered your query, wish you a good health.