Emergency Question

Shelby • 25 Years of Age, Due with my princess in June, Loss Of 3
I'm 6+5 Today but last night I was taking a shower and I decided to check my cervix to see how things are since I've had three previous miscarriages. It was slightly open. What the heck does that mean? My doctor didn't check me my first appointment but did blood work on my hcg and I'm at 75,116. Is a open cervix normal?