Someone with hiv blood has to my very small open cut, can I have hiv? Should I get tested?

Probably zero risk. I don't understand the question. Have you had contact with someone known to have HIV? Even if such a person's blood came into contact with a cut you have, the risk is very low, probably zero. For over 20 years, nobody in the US has caught HIV without direct sexual or blood exposure; no infections from this kind of contact. You won't be the first. Don't worry about it.