Welcome to our Forum.  I'll be glad to comment.  The events you describe are no risk events for acquisition of HIV or other STIs.  First you do not know that your partner had HIV or any STIs- most women do not, even commercial sex workers.  Second and even more importantly however, HIV is transmitted only through DIRECT, UNPROTECTED sexual contact and even then the risk is small and depends on the type of sexual contact involved.  HIV is not transmitted through receipt of oral sex or having a partner's mouth on your scrotum or even the shaft of your penis.  Cuts from pubic hair trimming or shaving, scratches on your scrotum or cuts and abrasions on your fingers do not change this-still no risk, even if her mouth or saliva contact open cuts.  From what you describe, there is no reason for concern and no reason for testing. 

I hope that this comment is helpful.  EWH

If her tooth rubbed or touched  my balls  while giving blow job , it can cause actively bleeding wound , if she had any  blood in her mouth , it can enter in my body through wound .  Can i get hiv like this??

If two wounds touch or rub together  , is der possiblity of getting hiv??