The species in your specimen photos are intestinal & liver flukes.
Details on the various fluke species, life cycles, & symptoms are covered under 'References' in the Fluke Protocol Drug Treatment Protocol: http://curezone.com/forums/fm.asp?i=1667673#i
Several fluke pics in the protocol are missing because the host website removed them or the site no longer exists. At Google.com, you can search under the Images category for more pics for comparison to yours.
Cheers - ICU
P.S. In which country do you live? Have you ever lived in Southeast Asia?