, Sorry about this issue of unruly children. You may sure get them referred to pediatrician and then to pediatric psychiatrist and possible medication.
It sure is difficult raising kids especially if there is no partner so please also consider giving away one or two of them .
Here is a link with ph. no. and email address if you need to discuss with advisors : http://www.youngminds.org.uk/for_parents/parent_helpline