You have a low risk hsv, ngu, Gono, syphilis, hpv(not well studied). Ngu or gono would most likely be the highest, but the lack of depth roaring as brought up would vertically lower the risk even less. Symptoms would be obvious with a discharge and urinary symptoms
Yes there is a risk, depending on a lot of factors such as is there deepthroating etc...
Just go get an std test.
Unless u can confirm she is std free, u r at a risk