I went to a saloon 2 days ago and got cut with shaving blade I am not sure whether barber changed the old blade will I get hiv I am worried...

Normally they clean ( if this was a straight razor) between clients. Did you not ask them about their sanitation procedure after you got cut.

But you said "changed blades" what type of razor was this

Normally they clean ( if this was a straight razor) between clients. did you not ask them about their sanitation procedure after you got cut.

but you said "changed blades" what type of razor was this

Straight ones in which razor blades are put to shave

I would not be too concerned. If you're concerned, talk to the barber and ask how often he changes out his blades.