Hi VideoEtTaceo (good name!),
...there wasn't much come back for the student, no.
When I initially collared the HT about it, his response was 'oh but raven, no one believes a word of it! We all know what [student x] is like. There were six staff members there who saw what really happened. You've nothing to worry about - she hasn't made an official complaint.'
He was quite taken aback when I said that actually, I wasn't prepared to laugh off a student publically claiming that I'd assaulted her - she had the right to have her allegations addressed seriously, even if she wasn't making them through the proper channels, but equally, if they were unfounded, school had a responsibility to make it clear to her that she couldn't be allowed to continue slandering staff members.
I honestly don't think she did it out of malice, or calculation - just a story to impress her mates that grew in the telling.
I wasn't particularly cross with the kid - it was the HT's jovial 'oh what a fuss about nothing!' attitude that grated more, tbh - I'm glad to say it wouldn't be the response I'd get from him now - as a school we have effective procedures in place these days to investigate allegations made against staff or peers by students.
She will have had a severe letting off for swearing, though. 
Had she said: 'Take your hands off me, you fucking cow' - that would merit exclusion, but 'Take your fucking hands off me' is not directly swearing at a teacher, & so only incurs a reprimand.
Hope it gets sorted quickly Kettricken...