Yes see a doctor. However, I feel that doctors often take a sledgehammer approach to mental illness, prescribing SSRIs and/or MAOIs whenever they hear the word "depression" or "anxiety". I'm not a MD, but after reading a little about the topic, it seems that a much better approach is to see what could be the cause of the deficiency in certain neurotransmitters. The reason could be that some of the enzymes involved in the process of producing them are defective due to genetic mutations. Certain tests (such as provided by 23andme) could reveal these defects, and could in theory provide much better treatment options. In many cases this could even start with taking certain dietary supplements, which help the body create the neurotransmitters. Such an approach seems so much more sensible than just "drowning" the brain in neurotransmitters, which is basically what SSRIs and MAOIs do.
However, I have yet to see a doctor that knows anything about metabolic pathways and such.