There isn't a lot of research on whether you can get an STD from fingering. There is very little published research addressing the question of whether fingering is a risk factor and fingering examined the HPV risks of fingering in virgin girls and found them to be relatively low. STI's That Are Spread Through Skin Contact.
I'm 14 and still a virgin, but my boyfriend fingers me and gives me oral sex. For a couple of weeks, my vagina has been itchy and red, and it hurts when I touch it.