Don't sweat it blahblah454,
Its happened to me before aswell during a short sex fueled encounter with a fuck buddy for the first time although we had been communicating with each other for good 3 months at least and finally we had a chance to meet up in our first physical romp.
BigBen said alot of my thoughts with real style
Something I made sure of though was that she had a very memorable and extremely pleasurable time even though I was facing the "performance anxiety demons". As that's exactly what it was and now learnt from that and read some real good advice that put it in perspective for me.
"Its not about the destination, but journey itself"
With this girl anyway it has heightened my experience (arousal etc) as I enjoy even more so then before pleasuring her without the goal orientated performance that sex can be sometimes seen as, for those less experienced and un-inlightened individuals such as myself.
Btw, its good that she didn't seem to mind about your aniexty issues down there as it lets you stress less and stimulate her in other ways, the tools are at your finger tips ...errr are your fingers
and beyond 