Welcome to the Forum. I'll be pleased to answer your question, repeating much of what was said earlier on the HIV Prevention Community site.
First however I will challenge your assumption that she was HIV infected. Most people, even most CSWs do not have HIV or other STDs. Even if she did however, and despite the fact that you likely got her genital secretions on you, there is no risk for HIV or other STD from participation in mutual masturbation - none at all. thus there is no reason for HIV testing either'
As for your question related to circumcision, it is clear that circumcised men, whether the procedure was done at birth or later up to adulthood, reduces the risk for HIV acquisition by about 50%.
I hope this information is helpful to you. No risk, no need to test. EWH
Thanks for the quick response! I thought as much but getting expert advice always helps ease anxiety. I think when you drink too much your mind races a bit as to what might have happened. Thanks again