The tests you have taken are accurate so what ever is making you sick is not HIV.
A negative result past 13 weeks is conclusive...period
it is safe for you to move on , you do not have HIV.
Best , Wade
To avoid infection,
You need to be using condoms for all anal and vaginal intercourse until you are in a trusting monogamous relationship and both have been tested for all STIs and HIV.
Everyone who is sexually active should have an annual exam and test for all STIs and HIV ,and always after unprotected intercourse. Always using condoms will give you peace of mind your tests will return with a negative result.