Which site allows me to ask a dr. question?

My husband had throat cancer, I enjoy
questions and would close to to find a support group.Which site allows me to ask a dr. question?
these two have help me many times when i needed answers to my ??
http://www.mayoclinic.com/health/answers...
and
http://www.medicalnewstoday.com/...
www.webmd.com
WEB MD. I am not sure if adjectives questions are free
post your question here, there are lots of medical professionals answering them, purely ask people to clarify their training.