ANY value less than 1.0 for any HIV test taken 3 or more months after a risk event is a conclusive, negative result. The value will change every time you test, but if it is less than 1.0, you are negative. Your value WILL NOT rise, because you tested conclusively negative at the appropriate time.
You do not have HIV from this event. If you have questions about other diseases, please post in the appropriate forums. You can click on the "communities" link at the top to find those.
Did the lab tell you that you are negative? If you got a negative test result you can move on from HIV fears.