This is not a risk for HIV. HIV is not transferred from person to person through the mouth. First, a cut in your mouth that wasn't bleeding to the point of requiring immediate medical attention isn't sufficient to allow HIV to enter the bloodstream. Second, saliva has properties that inhibit the virus.
No one, in the 40+ year history of HIV has been infected by an event like this, and you will not be the first. Forget about it and move on. The worst that could happen is you could contract a cold, flu, or other common virus. NOT HIV.