What Does Sudden Swelling In Eyelid With Sharp Pain In Eye Suggest?

Hello, my name is Trina and I woke up this morning with my eye lid swollen half over my eye twords the end of my eyelid. I started thinking what could have caused it and last night when I was laying in bed on my back i felt a sharp pain in my eye so I thought maybe something fell In my eye but I looked and nothing was there it just looked normal and my eyelid started hurting immedently after that and this morning it was very swollen and hurts really bad to touch it..I have no clue what caused this or what's going on please help me
Thank you.