my son got hit in the eye yesterday with a cricket ball , he had a slight swelling which by today has now gone, however since yesterday he had no colour vision, this has now returned this afternoon, however on way home from school he felt unwell today and is now in bed with high temp and a headache, all limbs are aching, tummy upset and wants to vomit.......is this linked to the eye, i am worried for clots etc.