Testing Window Period

I was tested 4 weeks after unprotected sex with an exboyfriend for the whole shebang. Everything came back negative.  The Nurse at the clinic told me to come back at 3 months to retest for Herpes and HIV, which I did (both were negative). I even retested for Herpes and HIV at 6 months a couple weeks ago and just barely got my negatives for those.  Today someone told me that 4 weeks was not long enough to wait to test for Hepatitis, that it can remain dormant in your system for YEARS without a test picking it up.  Is this true, or is someone using "old-school" info??  Do you think I should retest now?
Thanks

[spcecst2]

The only way to be sure is test every week for one year!!!!!!! Then every month for one year!!!!! And no sex at all for two years!!!!! If all your test come back negative then repeat the testing again for two years!!!!!!!!! That should cover the whole SheBang!!!! Good Luck!!!!!!!!!!!!!!