Hi Katheryn!
I had piercing, sharp vaginal pains from about 15/16 weeks until I delivered!
My doctor told me it was from how the baby was lying. The baby lays horizontally until about 24 weeks, when he/she is too big and must turn vertically. My doctor said the baby lying horizontally can cause those pains, and they should go away around 24-26 weeks.
However, mine never went away. I had absolutely no other pregnancy complications and gave birth to a healthy boy. I chalked the pain up to my retail job (40 hours on my feet, doing floor sets, window changes, etc).
I know it hurts like an SOB! Relaxing and moving slowly helped me manage and deal with it. Good luck!