Dear parent your question was forwarded to our expert here. https://community.theasianparent.com/q/everyone-excited-see-i-dr-smily-lock-head-healthcare-solutions-c/4511540 She will come online on Thursday, 16th February 2023 between 8.00 to 9.00 pm provide you to answer.
You will need to seek doctor to have it check. It is not normal when you have sudden bleeding during pregnancy. It could be of any reason.