If you are already part way through a degree, it would be a shame to throw away the years already invested. Presumably you have access to the student loan system. Your loan should cover fees and basic living expenses. Do you have somewhere to live?
If your child is three, are you eligible for 15 hours free childcare? Depending on your course, that should cover most of your childcare needs, shouldn’t it? Unless you are studying medicine or engineering etc.