Were you eligible for court-appointed counsel on this case, and did you apply? Reunification is never guaranteed. The Office of Children, Youth and Families generates a great deal of paperwork that is difficult to follow, and a lawyer would both need to see that information as well as obtain more specific information from you in an interview. Those of us who are familiar with this sort of case know that it's impossible to answer these things without seeing the county correspondence and reports.
You should have received petitions and court orders detailing what has occured in your case. I suggest that you immediately meet with an attorney who is familiar with dependency law to ascertain your legal rights to your children. If you are without financial means, contact the judge's chambers and reqeust free legal counsel. Just don't wait too long to get compentent legal advice as you may lose your children involuntarily. I'm happy to help and have attached my website for furhter information about us. Good luck!