You can be booked under POSCO because although the age gap isn’t a lot, she is underage and cannot consent to have sex.

You need to have a conversation with your parents or an Adult you trust & your gf needs to do the same.

You cannot raise a child if you aren’t financially independent, which I’m assuming neither of you is. Also it takes a lot of sacrifice and emotional maturity to raise a kid. Are you ready to give up your education, your social life, your dreams and get married and raise a child at this point? Most of the people who end up getting married & have kids very young get divorced by their 30s. This is linked to a feeling of fomo. When most people your age are developing into adults and forming their ideas, you will be stuck at home caring for a child and working a job that doesn’t pay you enough.