What was your exposure and we'll go from there.
You did have a risk with unprotected sex. And since it happened 8 months ago, any tests you take will be conclusive. A 4th generation duo test is conclusive at 28 days and beyond and all other generation tests are conclusive at 3 months. A one time unprotected sex exposure is very low risk of less than 1 percent. So, it is highly unlikely you got HIV from this but test and find out for sure. If you tested in the time frame I just stated, trust your result.