Sharp pain in clitoris?

I've had a similar experience in the past.. and a few since. Mine came after shaving and a stray hair somehow got wedged between my hood and my clitoris. The freshly trimmed, sharp edge of the hair was basically stabbing me in my most tender of tender parts. Until I took a peak and discovered the offender, it was incredibly uncomfortable.

Have someone check with a flashlight while pulling back the hood of the clitoris. There may be a loose hair stuck there, and once it's removed, INSTANT relief.

Rosie, This can be pretty common and it is not always something you did, You could try this HERE but if it continues to bother you please don't take any chances and call your doctor to make sure this is all it is. Here you go and when you are at the Pharmacy you could ask the Pharmacist on duty. Here you go.
If it's swollen after you cut it then it's likely infected and unless after 24 hours it's getting better you should call your doctor and ask for an appointment or other signs or symptoms to watch for. Another option that is safe even if you do need to see your doctor later would be a sitz bath - these are easily purchased at your pharmacy without a need of a prescription and they're usually pretty cheap. You will put it on the toilet to sit on warm water (and you can also add something to fight infection - ask your pharmacist for a good product if you don't know what to buy). These feel relieving to many people and really help with the swelling of the entire area. If your not comfortable call and get some medical advice.