I searched Google under the key words "Psychology migraines" to get these possible sources:
(Broken Link Removed)
You can do another search under "psychology heart disease" to get more specific coverage for your other topic with fewer sources that do not apply.
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
I hope this helps a little more. Thanks for asking.
Here are some additional specific articles that might be helpful:
I hope this helps even more. Thanks for asking.