So long as the test was three months post exposure consider yourself hiv negative and fortunate. The idea you are still developing anti-bodies is not a very likely scenario-at three months 97% of folks are either positive -or- negative for hiv. Everyone goes through this sort of doubt after a scare of being infected occurs-myself included.
rejoice in your neg status and get some professional help with your anxiety
please get some help you dont have hiv my friend
Seek professional mental help. You will not find the help you need on this forum.