Sharp pinching in vagina... 😰

Jane
Ladies help! I will be 36 weeks on Monday, but tonight especially the last hour I've been having this very sharp almost like a quick electric shock/pinch in my vagina.. Is this my cervix opening? I have no idea if I'm dilated or not. My appointment isn't until Thursday. Should I be worried? I'm not bleeding or anything. I've just had like maybe 10 sudden shocking instant pinch feeling. Like someone is pinching the skin where my vagina starts. They only last like 1 second.