fingering

My girlfriend and I have been together for a few months.  Since that time, I have had no problems giving her an orgasm as she climaxes everytime we start messing around.  I have noticed that it is very hard for her to climax when she's laying on her stomach, and she's even said she doesn't think she can do that.  Last time we messed around, she was on her stomach.  I went down on her, fingered her (vagina and butt), and massaged the clit.  She came close, but didn't climax.  We have done this before, then she switches positions and lays on her back so that she

hi there, i have been seeing this girl for a few weeks now & i feel we are at the stage to take relationship further, im 20 and i have done everything before but i always feel nervous fingering someone, like i dont know what im doing. i really need some tips for fingering and would be very grateful. many thanks.