Sharp pain on right side of head with tingling down the right side of my face. Feeling faint too.

Perhaps hypoglycemic. Did you have a good breakfast this morning? I know you're across the pond so perhaps by my standards the answer would be NO! LOL! Nevertheless, HYPO glycemia comes to mind only because of your symptom of feeling faint. The sharp pain could be from a slight tension type headache. Do you get headaches? How long did the head pain last? Has this happened before? Fill us in a bit more please.
ER now. although this might be an irritated nerve- I strongly suggest immediate ER evaluation to rukle out the possibility of a "min stroke" ( TIA )- get checked ASAP.