Hello and welcome
The two reports can not be wrong. And
HIV came back positive after 3-5 months of the exposure. You have done the test at right time and if there is any sign it may came positive. I do not know about the method of test you have done. But still you have any doubt in your mind you can go for PCR test to relax your mind. I hope it will also came back negative. Do not be afraid and enjoy
safe sex.
Best Wishes