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There are a couple of placed to start.
One is calling your general MD and asking them to make the appointment for you at the local mental health clinic.
The second option is going to this site http://www.co.sanmateo.ca.us/portal/site/health/menuitem.e61f1c321415a767a181dda7917332a0/?vgnextoid=7c8579a5a91a0210VgnVCM1000001d37230aRCRD&vgnextfmt=DivisionsLanding and calling them yourself. This is the community mental health clinic and they will be able to see you at very low cost to free. They go on a sliding scale basis.
Another option is calling the local psychiatrist in your area and letting them know your situation. They may have a few sliding scale spots and may be willing to see you.
Please let me know if I can assist anymore! I am here to help.