Aw, mama, I understand you're worried! Please bring baby to the doctor or clinic asap para ma-check nang maayos, bloodstained mucus ay kailangan tingnan ng professional, lalo na kung mixed feeding pa lang siya.
One of my mum friends had something similar with her baby, and it turned out kailangan lang ng doc's guidance, hindi scary pag nacheck agad. Don't worry, you're doing the right thing by asking! But please, see a healthcare provider soon para peace of mind mo at baby's health. Sending you both strength!