Hi Susaqn
To be honest, I would get her straight to A&E ! To be told to be careful of 'blood clots' from a doctor, and just let it go like that is really not very professional of them, especially as they assumed it's a deep muscle injury, without running the proper examination or x-ray to confirm this diagnosis... get her to a hospital, for a second opinion, and insist on a x-ray, to ensure this isn't anything serious. It may be adeep muscle injury, but as you are posting, then you are showing real concern about this.
You and your daughter take care.
Ginger