No, you are reported Negative and your test is final and conclusive
Arun,this link gives exact reply for your doubt.
http://www.ukcoalition.org/HIV-Test/19314.htm
Hi,
They are 4th generation tests and are very reliable.
Specially the test you have after 4 months, is final and conclusive without any doubt You are OK. You are not HIV+.
The recent discussions on window period seems will continue for a while. Many respectable organizations and doctors have been counting on 6 week for the last few years. 6 week became defacto standart, even many doctors say 6 week conclusive
although they must say 3 month according to CDC.
But you are definetely OK.