What can you do if the parents insurance company dropped you and you are 19 years old and a full time college student?

I would check and see if they really can drop you if you are a full time student. Check the policy. Also check here http://www.steveshorr.com/dependent.definitions.htm

You might check with your school on student policies.

Check here for Individual Plans in CA http://www.quotit.net/eproIFP/webPages/infoEntry/InfoEntryZip.asp?license_no=0596610