EBSCOhost is a collection of databases. I recommend 3 as good possibilities for your topics: Academic Search Elite (all subject areas), CINAHL with Full Text (topics in health and medicine), and Health Source (also health and medicine). Remember to limit your search to full-text articles.
There are a few psychology journals on this site as well, but it's mostly for the DSM V (and DSM-IV-TR), the American Psychiatric Association's reference book on mental disorders.
Websites of Psychological Associations and Agencies