First off, CYS isn't going to do anything but possibly offer support to the teen mom. She'd have to be more than 2 weeks pregnant, as there is no such timeline in pregnancy. When you find out you are pregnant, you are at least 4 weeks. If your period is late by 2 weeks, you are 6 weeks pregnant. Just because her mother didn't put her on birth control, doesn't mean there has been a crime or lack in parenting. A lack in foresight maybe, but nothing more.
If she wants an abortion and it is legal for her age where she lives, why doesn't she go get one?
Miscarriage is doubtful, that isn't likely even with stress. A lot of mothers - teen mothers, grown mothers - deal with stress and have perfectly healthy babies.